Kyoung-Sook Kim, Hirotaka Ogawa, Akihito Nakamura, Isao Kojima. Sophy: a morphological framework for structuring geo-referenced social media. In Alexei Pozdnoukhov, Sen Xu, editors, Proceedings of the 7th ACM SIGSPATIAL International Workshop on Location-Based Social Networks, LBSN 2014, Dallas/Fort Worth, Texas, USA, November 4, 2014. pages 31-40, ACM, 2014. [doi]