@INPROCEEDINGS{Kessler-ECMR-2011,
author = {Kessler, Jens and Scheidig, Andrea and Gross, Horst-Michael},
title = {Approaching a Person in a Socially Acceptable Manner Using Expanding
Random Trees},
booktitle = {Europ. Conf. on Mobile Robots (ECMR)},
year = {2011},
pages = {95--100}
}