@article{'BosOka2007AdvRob',
   title     = {'Meaningful Conversation with Mobile Robots'},
   author    = {Bos, Johan and 'Oka', 'Tetsushi'},
   journal   = {'Advanced Robotics'},
   volume    = {21},
   number    = {2},
   pages     = {209--232},
   year      = {2007}
}