Makoto Kawano, Takuro Yonezawa, Jin Nakazawa, Satoshi Kawasaki, Ken Ohta, Hiroshi Inamura, Hideyuki Tokuda. Classifying urban events' popularity by analyzing friends information in location-based social network. In Fahim Kawsar, Ulf Blanke, Afra J. Mashhadi, Bashar Altakrouri, editors, The First International Conference on IoT in Urban Space, Urb-IoT 2014, Rome, Italy, October 27-28, 2014. pages 87-89, ICST, 2014. [doi]