Influence of the distribution of mobile users on a C/I balanced multi antenna digital cellular radio system. - Ralph Schmalenberger; Josef Johannes Blanz (PIMRC, 1997)

Geometry-based directional model for mobile radio channels - principles and implementation. - Andreas F. Molisch; Alexander Kuchar; Juha Laurila; Klaus Hugl; Ralph Schmalenberger (Eur. Trans. Telecommun., 2003)