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).