A GPS positioning approach exploiting GSM velocity estimates
S. Peschke, M. Bevermeier, R. Haeb-Umbach, in: 6th Workshop on Positioning Navigation and Communication (WPNC 2009), 2009, pp. 195–202.

A Novel Similarity Measure for Positioning Cellular Phones by a Comparison With a Database of Signal Power Levels
R. Haeb-Umbach, S. Peschke, IEEE Transactions on Vehicular Technology 56 (2007) 368–372.

Velocity Estimation of Mobile Terminals by Exploiting GSM Downlink Signalling
S. Peschke, R. Haeb-Umbach, in: 4th Workshop on Positioning Navigation and Communication (WPNC 2007), 2007, pp. 217–222.