New method for logical structure extraction of form document image. - Bing Liu; Zao Jiang; Hong Zhao; Tobias Ostgathe (Document Recognition and Retrieval, 1999)

Content-based Index and Retrieval Method of Chinese Document Images. - Yaodong He; Zao Jiang; Bing Liu; Hong Zhao (ICDAR, 1999)

Global-local-global method for logical structure extraction of form document image. - Hong Zhao; Bing Liu; Zao Jiang; Tobias Ostgathe (J. Electronic Imaging, 2000)