Subject space: a state-persistent model for publish/subscribe systems. - Hubert Ka Yau Leung (CASCON, 2002)

Predicate Matching and Subscription Matching in Publish/Subscribe Systems. - Ghazaleh Ashayer; Hubert Ka Yau Leung; Hans-Arno Jacobsen (ICDCS Workshops, 2002)

Modeling location-based services with subject spaces. - Hubert Ka Yau Leung; Ioana Burcea; Hans-Arno Jacobsen (CASCON, 2003)

Efficient matching for state-persistent publish/subscribe systems. - Hubert Ka Yau Leung; Hans-Arno Jacobsen (CASCON, 2003)