Letter: A Simple Multilevel Block-Coding Scheme with π/4-QPSK Properties. - Werner Henkel; Manfred Litzenburger (Eur. Trans. Telecommun., 1993)

A comparison of trellis shaping schemes for controlling the envelope of a bandlimited PSK-signal. - Manfred Litzenburger; Werner Rupprecht (VTC, 1994)

Signalling for handover in a broadband cellular ATM system. - Klaus Keil; Hajo-Erich Bakker; Wolfgang Schödl; Manfred Litzenburger (Broadband Communications, 1998)

Very Tight Coupling of Wireless LANs and UMTs Networks: A Technical Challenge and an Opportunity for Mobile Operators. - Manfred Litzenburger; Hajo-Erich Bakker; Stephen Kaminski; Klaus Keil (PWC, 2002)