Karl, H., Willig, A., &; Wolisz, A. (Eds.). (2004). Wireless Sensor Networks. First European Workshop, EWSN 2004, Berlin, Germany, January 19-21, 2004, Proceedings.https://doi.org/10.1007/b94854 

Niebert, N., Flinck, H., Hancock, R., Karl, H., &; Prehofer, C. (2004). Ambient Networks--Research for Communication Networks Beyond 3G. In 13th IST Mobile and Wireless Communications-Summit 2004.

Gross, J., Paoluzzi, I., Karl, H., &; Wolisz, A. (2004). Throughput study for a dynamic OFDM-FDMA system with inband signaling. In Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th (pp. 1787--1791).

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.

Carlson, E., Karl, H., Wolisz, A., &; Prehofer, C. (2004). Distributed allocation of time slots for real-time traffic in a wireless multi-hop network. In Proc. European Wireless. Barcelona/Spain.

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.

Carlson, E., Bettstetter, C., Karl, H., Prehofer, C., &; Wolisz, A. (2004). Distributed maintenance of resource reservation paths in multihop 802.11 networks. In Vehicular Technology Conference, 2004. V-Fall. 2004 IEEE 60th (pp. 2994--2998).

Gross, J., Karl, H., &; Wolisz, A. (2004). On the effect of inband signaling and realistic channel knowledge on dynamic OFDM-FDMA systems. In European Wireless 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 

Gross, J., Karl, H., &; Wolisz, A. (2004). Throughput optimization of dynamic OFDM-FDMA systems with inband signaling. In 2nd International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks 2004 (WiOpt 2004).

Handziski, V., Köpke, A., Karl, H., &; Wolisz, A. (2003). A common wireless sensor network architecture? Berlin.

Drytkiewicz, W., Sroka, S., Handzisk, V., Köpke, A., &; Karl, H. (2003). A Mobility Frame work for OMNeT++. In Proc. of 3rd International OMNeT++ Workshop at Budapest University of Technology and Economics.

Fu, X., Chen, T., Festag, A., Karl, H., Schäfer, G., &; Fan, C. (2003). Secure, QoS-Enabled Mobility Support for IP-based Networks. In Proceedings IP Based Cellular Network Conference IPCN, Paris / France, Dezember .

Geerdes, H.-F., &; Karl, H. (2003). The Potential of Relaying in Cellular Networks . In Proceedings of INOC 2003, Evry/Paris.

Aguiar, A., Hoene, C., Klaue, J., Karl, H., Miesmer, H., &; Wolisz, A. (2003). Channel-aware Schedulers for VoIP and MPE based on Channel Prediction. In Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03).

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 

Aguiar, A., Karl, H., Wolisz, A., &; Miesmer, H. (2003). A Framework for Evaluating Effects of Channel Prediction Inaccuracy on the Performance of Channel Adaptive Techniques. In Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, USA (pp. 3--9).

Gross, J., Karl, H., H. P. Fitzek, F., &; Wolisz, A. (2003). Comparison of Heuristic and Optimal Subcarrier Assignment Algorithms. In Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, USA (pp. 249--255).

J. M. Havinga, P., Etalle, S., Karl, H., Petrioli, C., Zorzi, M., Kip, H., &; Lentsch, T. (2003). EYES - Energy Efficient Sensor Networks. In Personal Wireless Communications, IFIP-T 8th International Conference, PWC 2003, Venice, Italy, September 23-25, 2003, Proceedings (pp. 198--201).https://doi.org/10.1007/978-3-540-39867-7_20