Ghafouri, S., Razavi, K., Salmani, M., Sanaee, A., Lorido Botran, T., Wang, L., Doyle, J., &; Jamshidi, P. (n.d.). IPA: Inference Pipeline Adaptation to Achieve High Accuracy and Cost-Efficiency. Journal of Systems Research (JSys).

Redder, A., Ramaswamy, A., &; Karl, H. (2022). Practical Network Conditions for the Convergence of Distributed Optimization. IFAC-PapersOnLine, 55(13), 133–138.

Schneider, S. B., Khalili, R., Manzoor, A., Qarawlus, H., Schellenberg, R., Karl, H., &; Hecker, A. (2021). Self-Learning Multi-Objective Service Coordination Using Deep Reinforcement Learning. Transactions on Network and Service Management.https://doi.org/10.1109/TNSM.2021.3076503 

Nomikos, N., Michailidis, E. T., Trakadas, P., Vouyioukas, D., Karl, H., Martrat, J.,https://doi.org/10.1016/j.vehcom.2020.100250__Voliotis, S. (2020). A UAV-based moving 5G RAN for massive connectivity of mobile users and IoT devices. Vehicular Communications.https://doi.org/10.1016/j.vehcom.2020.100250 

Li, F., Yu, D., Yang, H., Yu, J., Karl, H., &; Cheng, X. (2020). Multi-Armed-Bandit-Based Spectrum Scheduling Algorithms in Wireless Networks: A Survey. IEEE Wireless Communications, 24–30.https://doi.org/10.1109/mwc.001.1900280 

Karl, H., Kundisch, D., Meyer auf der Heide, F., &; Wehrheim, H. (2020). A Case for a New IT Ecosystem: On-The-Fly Computing. Business &; Information Systems Engineering, 62(6), 467–481.https://doi.org/10.1007/s12599-019-00627-x 

Peuster, M., Dröge, C., Boos, C., &; Karl, H. (2019). Joint testing and profiling of microservice-based network services using TTCN-3. ICT Express.https://doi.org/10.1016/j.icte.2019.02.001 

Peuster, M., Küttner, H., &; Karl, H. (2019). A flow handover protocol to support state migration in softwarized networks. International Journal of Network Management.https://doi.org/10.1002/nem.2067 

Soenen, T., Tavernier, W., Peuster, M., Vicens, F., Xilouris, G., Kolometsos, S.,https://doi.org/10.1109/mcom.2019.1800810__Colle, D. (2019). Empowering Network Service Developers: Enhanced NFV DevOps and Programmable MANO. IEEE Communications Magazine, 89–95.https://doi.org/10.1109/mcom.2019.1800810 

Peuster, M., Schneider, S. B., Zhao, M., Xilouris, G., Trakadas, P., Vicens, F.,https://doi.org/10.1109/mcom.2019.1800873__Karl, H. (2019). Introducing Automated Verification and Validation for Virtualized Network Functions and Services. IEEE Communications Magazine, 96–102.https://doi.org/10.1109/mcom.2019.1800873 

Leong, A. S., Ramaswamy, A., Quevedo, D. E., Karl, H., &; Shi, L. (2019). Deep reinforcement learning for wireless sensor scheduling in cyber–physical systems. Automatica.https://doi.org/10.1016/j.automatica.2019.108759 

Peuster, M., Marchetti, M., García de Blas, G., &; Karl, H. (2019). Automated testing of NFV orchestrators against carrier-grade multi-PoP scenarios using emulation-based smoke testing. EURASIP Journal on Wireless Communications and Networking.https://doi.org/10.1186/s13638-019-1493-2 

Dräxler, S., Karl, H., &; Mann, Z. A. (2018). JASPER: Joint Optimization of Scaling, Placement, and Routing of Virtual Network Services. IEEE Transactions on Network and Service Management.https://doi.org/10.1109/TNSM.2018.2846572 

Dräxler, S., &; Karl, H. (2017). Specification, Composition, and Placement of Network Services with Flexible Structures. International Journal of Network Management, (2), 1--16.https://doi.org/10.1002/nem.1963 

Keller, M., &; Karl, H. (2017). Response-Time-Optimised Service Deployment: MILP Formulations of Piece-wise Linear Functions Approximating Non-linear Bivariate Mixed-integer Functions. IEEE Transactions on Network and Service Management, (1), 121--135.https://doi.org/10.1109/TNSM.2016.2611590 

Karl, H., Dräxler, S., Peuster, M., Galis, A., Bredel, M., Ramos, A.,https://doi.org/10.1002/ett.3084__Xilouris, G. (2016). DevOps for network function virtualisation: an architectural approach. Transactions on Emerging Telecommunications Technologies, 27(9), 1206–1215.https://doi.org/10.1002/ett.3084 

Wette, P., &; Karl, H. (2016). DCT<sup>2</sup>Gen: A traffic generator for data centers. Computer Communications, 45--58.https://doi.org/10.1016/j.comcom.2015.12.001 

Herlich, M., Bredenbals, N., &; Karl, H. (2016). Delayed (de-)activation in servers with a sleep mode. Sustainable Computing: Informatics and Systems, 10, 48–55.https://doi.org/10.1016/j.suscom.2016.04.002 

Künsemöller, J., &; Karl, H. (2014). A Game-Theoretic Approach to the Financial Benefits of Infrastructure-as-a-Service. Future Generation Computer Systems, 44--52.https://doi.org/10.1016/j.future.2014.03.005 

Beister, F., Dräxler, M., Aelken, J., &; Karl, H. (2014). Power model design for ICT systems -- A generic approach. Computer Communications, 77--85.https://doi.org/10.1016/j.comcom.2014.02.007 

Azeem M. Khan, R., &; Karl, H. (2014). MAC Protocols for Cooperative Diversity in Wireless LANs and Wireless Sensor Networks. IEEE Communications Surveys and Tutorials, (1), 46--63.https://doi.org/10.1109/SURV.2013.042313.00067 

Beister, F., Dräxler, M., Aelken, J., &; Karl, H. (2014). Power model design for ICT systems – A generic approach. Computer Communications, 50, 77–85.https://doi.org/10.1016/j.comcom.2014.02.007 

Dannewitz, C., Kutscher, D., Ohlman, B., Farrell, S., Ahlgren, B., &; Karl, H. (2013). Network of Information (NetInf) - An information-centric networking architecture. Computer Communications, (7), 721--735.https://doi.org/10.1016/j.comcom.2013.01.009 

Dräxler, M., Biermann, T., &; Karl, H. (2013). Improving Cooperative Transmission Feasibility by Network Reconfiguration in Limited Backhaul Networks. International Journal of Wireless Information Networks, (3), 183--194.https://doi.org/10.1007/s10776-013-0207-7 

Biermann, T., Scalia, L., Choi, C., Kellerer, W., &; Karl, H. (2013). How backhaul networks influence the feasibility of coordinated multipoint in cellular networks. IEEE Communications Magazine, (8).https://doi.org/10.1109/MCOM.2013.6576356 

Biermann, T., Scalia, L., Choi, C., Karl, H., &; Kellerer, W. (2012). CoMP clustering and backhaul limitations in cooperative cellular mobile access networks. Pervasive and Mobile Computing, (5), 662--681.https://doi.org/10.1016/j.pmcj.2012.03.005 

Willig, A., Karl, H., &; Kipnis, D. (2012). Segment-based packet combining: how to schedule a dense relayer cluster? Wireless Networks, (2), 199--213.https://doi.org/10.1007/s11276-011-0395-y 

Ahlgren, B., A. Aranda-Gutierrez, P., Chemouil, P., Oueslati, S., M. Correia, L., Karl, H.,https://doi.org/10.1109/MCOM.2011.5936156__Welin, A. (2011). Content, connectivity, and cloud: ingredients for the network of the future. IEEE Communications Magazine, (7), 62--70.https://doi.org/10.1109/MCOM.2011.5936156 

Conti, M., Chong, S., Fdida, S., Jia, W., Karl, H., Lin, Y.-Dar,https://doi.org/10.1016/j.comcom.2011.09.001__Zukerman, M. (2011). Research challenges towards the Future Internet. Computer Communications, (18), 2115--2134.https://doi.org/10.1016/j.comcom.2011.09.001 

Warneke, D., &; Dannewitz, C. (2011). Load Balancing in P Networks: Using Statistics to Fight Data and Execution Skew. Journal of Advances in Information Technology, 2(1).https://doi.org/10.4304/jait.2.1.40-49 

Dannewitz, C., Biermann, T., Dräxler, M., &; Karl, H. (2011). Complex Queries in P Networks with Resource-Constrained Devices. Journal of Advances in Information Technology, 2(1).https://doi.org/10.4304/jait.2.1.2-14 

Valentin, S., &; Karl, H. (2010). Cooperative feedback to improve capacity and error rate in multiuser diversity systems - an OFDM case study. European Transactions on Telecommunications, 21(8), 714–724.https://doi.org/10.1002/ett.1454 

Valentin, S., &; Karl, H. (2010). Cooperative feedback to improve capacity and error rate in multiuser diversity systems - an OFDM case study. European Transactions on Telecommunications, (8), 714--724.https://doi.org/10.1002/ett.1454 

S. Lichte, H., Valentin, S., &; Karl, H. (2010). Expected interference in wireless networks with geometric path loss: a closed-form approximation. IEEE Communications Letters, (2), 130--132.https://doi.org/10.1109/LCOMM.2010.02.091863 

Simon Lichte, H., Valentin, S., &; Karl, H. (2010). Automated Development of Cooperative MAC Protocols - A Compiler-Assisted Approach. Mobile Networks and Applications, (6), 769--785.https://doi.org/10.1007/s11036-009-0210-5 

Biermann, T., Dräxler, M., &; Karl, H. (2009). Flow Synchronization for Network Coding. Journal of Communications, (11), 873--884.https://doi.org/10.4304/jcm.4.11.873-884 

Valentin, S., S. Lichte, H., Karl, H., Vivier, G., Simoens, S., Vidal, J., &; Agustin, A. (2009). Cooperative Wireless Networking Beyond Store-and-Forward . Wireless Personal Communications, (1), 49--68.https://doi.org/10.1007/s11277-007-9429-2 

Festag, A., Karl, H., &; Wolisz, A. (2007). Investigation of multicast-based mobility support in all-IP cellular networks. Wireless Communications and Mobile Computing, (3), 319--339.https://doi.org/10.1002/wcm.328 

Valentin, S., Lichte, H. S., Karl, H., Simoens, S., Vivier, G., Vidal, J., &; Agustin, A. (2007). Implementing cooperative wireless networks. Cognitive Wireless Networks, 155--178.https://doi.org/10.1007/978-1-4020-5979-7_8 

Hoene, C., Karl, H., &; Wolisz, A. (2006). A perceptual quality model intended for adaptive VoIP applications. Int. J. Communication Systems, (3), 299--316.https://doi.org/10.1002/dac.755 

Gross, J., Geerdes, H.-Florian, Karl, H., &; Wolisz, A. (2006). Performance analysis of dynamic OFDMA systems with inband signaling. IEEE Journal on Selected Areas in Communications, (3), 427--436.https://doi.org/10.1109/JSAC.2005.862386 

Carlson, E., Prehofer, C., Bettstetter, C., Karl, H., &; Wolisz, A. (2006). A Distributed End-to-End Reservation Protocol for IEEE 802.11-Based Wireless Mesh Networks. IEEE Journal on Selected Areas in Communications, (11), 2018--2027.https://doi.org/10.1109/JSAC.2006.881633 

Ebert, J.-P., Hollos, D., Karl, H., &; Löbbers, M. (2005). Does Multi-Hop Communication Reduce Electromagnetic Exposure? Comput. J., (1), 72--83.https://doi.org/10.1093/comjnl/bxh062 

Savoric, M., Karl, H., Schläger, M., Poschwatta, T., &; Wolisz, A. (2005). Analysis and performance evaluation of the EFCM common congestion controller for TCP connections. Computer Networks, (2), 269--294.https://doi.org/10.1016/j.comnet.2005.01.012 

Gross, J., Valentin, S., Karl, H., &; Wolisz, A. (2005). A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system. European Transactions on Telecommunications, (1), 37--49.https://doi.org/10.1002/ett.1030 

Karl, H., Lentsch, T., &; Ritter, H. (2005). Drahtlose Sensornetze. Praxis Der Informationsverarbeitung Und Kommunikation, (2), 66--67.https://doi.org/10.1515/PIKO.2005.66 

Willig, A., &; Karl, H. (2005). Data Transport Reliability in Wireless Sensor Networks. A Survey of Issues and Solutions. Praxis Der Informationsverarbeitung Und Kommunikation, (2), 86--92.https://doi.org/10.1515/PIKO.2005.86 

Gross, J., Valentin, S., Karl, H., &; Wolisz, A. (2005). A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system. European Transactions on Telecommunications, 16(1), 37–49.https://doi.org/10.1002/ett.1030 

Gross, J., Klaue, J., Karl, H., &; Wolisz, A. (2004). Cross-layer optimization of OFDM transmission systems for MPEG-4 video streaming. Computer Communications, (11), 1044--1055.https://doi.org/10.1016/j.comcom.2004.01.010 

Niebert, N., Schieder, A., Abramowicz, H., Malmgren, G., Sachs, J., Horn, U.,https://doi.org/10.1109/MWC.2004.1295733__Karl, H. (2004). Ambient networks: An architecture for communication networks beyond 3G. IEEE Wireless Communications, (2), 14--22.https://doi.org/10.1109/MWC.2004.1295733 

Klimin, N., Enkelmann, W., Karl, H., &; Wolisz, A. (2004). A hybrid approach for location-based service discovery in vehicular ad hoc networks. Proc. of WIT.

Mengesha, S., Karl, H., &; Wolisz, A. (2004). Capacity increase of multi-hop cellular wlans exploiting data rate adaptation and frequency recycling. Proc. of MedHocNet 2004.

Kubisch, M., Karl, H., &; Wolisz, A. (2004). A MAC protocol for wireless sensor networks with multiple selectable, fixed-orientation antennas. Frequenz, (3–4), 92--96.https://doi.org//10.1.1.3.3185 

Savoric, M., Karl, H., &; Wolisz, A. (2003). The TCP control block interdependence in fixed networks - new performance results. Computer Communications, (4), 366--375.https://doi.org/10.1016/S0140-3664(02)00155-X 

Zirwas, W., Habetha, J., &; Karl, H. (2003). Ziel-orientierter Entwurf von Multi-hop Medienzugriffsprotokollen. Praxis Der Informationsverarbeitung Und Kommunikation, (4), 184--189.https://doi.org/10.1515/PIKO.2003.184 

Karl, H. (2003). An overview of energy-efficiency techniques for mobile communication systems. Report of AG Mobikom W.

Ngo-Quynh, T., Karl, H., Wolisz, A., &; Rebensburg, K. (2002). New scheduling algorithm for providing proportional jitter in differentiated services network. Proceedings of IST Mobile Communication and Wireless Telecommunications Summit, Thessaloniki, Greece.

Karl, H. (1998). Bridging the gap between distributed shared memory and message passing. Concurrency - Practice and Experience, (11–13), 887--900.https://doi.org/10.1002/(SICI)1096-9128(199809/11)10:11/13&#38;#60;887::AID-CPE416&#38;#62;3.0.CO;2-0 

Baratloo, A., Karaul, M., Karl, H., &; M. Kedem, Z. (1998). An infrastructure for network computing with Java applets. Concurrency -- Practice and Experience, (11–13), 1029--1041.https://doi.org/10.1002/(SICI)1096-9128(199809/11)10:11/13&#38;#60;1029::AID-CPE412&#38;#62;3.0.CO;2-U 

Karl, H., Werner, M., &; Küttner, L. (1998). Experimental investigation of message latencies in the Totem protocol in the Presence of faults. IEEE Proceedings -- Software, (6), 219--227.https://doi.org/10.1049/ip-sen:19982443 

Baratloo, A., Karaul, M., Karl, H., &; Kedem, Z. M. (1997). KnittingFactory: An Infrastructure for Distributed Web Applications. Technical Report.