Ma, Jixin, Knight, Brian and Petridis, Miltos (2008) Characterizing the most general temporal constraint. In: ECAI-08 Workshop on Spatial and Temporal Reasoning, 22 Jul 2008, University of Patras, Patras, Greece. (Unpublished)

Zhao, Guoxing, Ma, Jixin and Petridis, Miltos (2008) The completeness and soundness of temporal theories. In: ECAI-08 Workshop on Spatial and Temporal Reasoning, 22 Jul 2008, University of Patras, Patras, Greece.

Ma, Jixin and Hayes, Pat (2005) Addressing time intervals. In: Nineteenth International Joint Conference on Artificial Intelligence (IJCAI-05) [Proceedings]. International Joint Conferences on Artificial Intelligence, Edinburgh, UK, pp. 29-38.