Excalibur: A Personalized Meta Search Engine. - Leo Yuen; Matthew Chang; Ying Kit Lai; Chung Keung Poon (COMPSAC Workshops, 2004)

Relational Index Support for XPath Axes. - Leo Yuen; Chung Keung Poon (XSym, 2005)

Faster Twig Pattern Matching Using Extended Dewey ID. - Chung Keung Poon; Leo Yuen (DEXA, 2006)

Design and Implementation of an Automated System for Assessment of Computer Programming Assignments. - Marian Choy; Sam Lam; Chung Keung Poon; Fu Lee Wang; Yuen-Tak Yu; Leo Yuen (ICWL, 2007)