Media type: E-Article Title: Modular and hierarchical structure of social contact networks Contributor: Ge, Yuanzheng; Song, Zhichao; Qiu, Xiaogang; Song, Hongbin; Wang, Yong imprint: Elsevier BV, 2013 Published in: Physica A: Statistical Mechanics and its Applications Language: English DOI: 10.1016/j.physa.2013.05.051 ISSN: 0378-4371 Keywords: Condensed Matter Physics ; Statistics and Probability Origination: Footnote: