Yutaka Matsuo Naoaki Okazaki Kiyoshi Izumi Yoshiyuki Nakamura Takuichi Nishimura Kôiti Hasida Hideyuki Nakashima Inferring Long-term User Properties Based on Users' Location History. 2159-2165 2007 conf/ijcai/2007 IJCAI http://dli.iiit.ac.in/ijcai/IJCAI-2007/PDF/IJCAI07-348.pdf db/conf/ijcai/ijcai2007.html#MatsuoOINNHN07