@INPROCEEDINGS{Mueller-ROMAN-2008,
  author = {Mueller, {\relax St}effen and Hellbach, Sven and Schaffernicht, Erik
    and Ober, Antje and Scheidig, Andrea and Gross, Horst-Michael},
  title = {Whom to Talk to? Estimating User Interest from Movement Trajectories},
  booktitle = {IEEE Int. Symp. on Robot and Human Interactive Communication (RO-MAN)},
  year = {2008},
  pages = {532--538},
  publisher = {IEEE}
}