Huifang Ma Weizhong Zhao Zhixin Li Zhongzhi Shi IPHITS: An Incremental Latent Topic Model for Link Structure. 242-253 2009 AIRS http://dx.doi.org/10.1007/978-3-642-04769-5_21 conf/airs/2009 db/conf/airs/airs2009.html#MaZLS09