@techreport{weko_52113_1,
   author	 = "J.Verges-Llahi and T,Wada and S,Nishio and N,Babaguchi and N,Hagita",
   title	 = "Multiple-Tracking of Crowds Based on a Leader/Follower Strategy and the Dropping-Pebbles Method",
   year 	 = "2007",
   institution	 = "ATR Intelligent Robotics and Communication Laboratories, Dept. of Computer & Comm.  Wakayama University, ATR Intelligent Robotics and Communication Laboratories, Grad.School of Engineering, ATR Intelligent Robotics and Communication Laboratories",
   number	 = "1(2007-CVIM-157)",
   month	 = "jan"
}