Emrah Akin Sisbot Rachid Alami Thierry Siméon Kerstin Dautenhahn Mick L. Walters Sarah N. Woods Navigation in the presence of humans. 181-188 2005 Humanoids http://dx.doi.org/10.1109/ICHR.2005.1573565 conf/humanoids/2005 db/conf/humanoids/humanoids2005.html#SisbotASDWW05