Savori, M., Karl, H., &; Wolisz, A. (2010). Selected properties of a joint congestion controller for TCP connections. In Providing Quality of Service in Heterogeneous Environments, Proceedings of the 18th International Teletraffic Congress - ITC-18 (pp. 861–870). Elsevier.https://doi.org/10.1016/s1388-3437(03)80235-4 

Biermann, T., Schwabe, A., &; Karl, H. (2009). Creating Butterflies in the Core – A Network Coding Extension for MPLS/RSVP-TE. In NETWORKING 2009 (pp. 883–894). Berlin, Heidelberg: Springer Berlin Heidelberg.https://doi.org/10.1007/978-3-642-01399-7_69 

Biermann, T., Dannewitz, C., &; Karl, H. (2008). Extended Results on an Adaptive Resource/Performance Trade-Off for Resolving Complex Queries in P Networks.

Woldegebreal, D. H., &; Karl, H. (2008). Network-Coding-Based Cooperative Transmission in Wireless Sensor Networks: Diversity-Multiplexing Tradeoff and Coverage Area Extension. In Lecture Notes in Computer Science (pp. 141–155). Berlin, Heidelberg: Springer Berlin Heidelberg.https://doi.org/10.1007/978-3-540-77690-1_9 

Eitzen, F., Valentin, S., Gossens, K., Karl, H., &; Rolfes, O. (2007). Experimental evaluation of IEEE 802.11a-based WLANs for medium range communication.

Valentin, S., von Malm, H., &; Karl, H. (2006). Evaluating the GNU Software Radio platform for wireless testbeds.

Karl, H., &; Willig, A. (2005). Protocols and architectures for wireless sensor networks.

Karl, H. (2005). Ad Hoc Networks. In The Industrial Information Technology Handbook (pp. 1--16).

Karl, H. (2004). Data Transmission in Mobile Communication Systems. In Location-Based Services (pp. 207--244).

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

Karl, H., Mengesha, S., &; Hollos, D. (2002). Relaying in Wireless Access Networks . London: Business Briefing: Wireless Technology 2002.