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