@INPROCEEDINGS{schaffernicht11121, author = {Mueller, Steffen and Schaffernicht, Erik and Scheidig, Andrea and Boehme, Hans-Joachim and Gross, Horst-Michael}, title = {Are You Still Following Me?}, booktitle = {Europ. Conf. on Mobile Robots (ECMR)}, year = {2007}, pages = {211--216}, publisher = {Albert-Ludwigs-Universitaet Freiburg -- Universitaetsverlag} }