T. Finin, "Pfc Users Manual", TechReport, August 1999, 224 downloads.
1989
T. Finin, R. Fritzson, and D. Matuszek, "Adding forward chaining and truth maintenance to Prolog", InProceedings, Proceedings of the Fifth IEEE Conference on Artificial Intelligence Applications, March 1989, 1478 downloads.
UMBC ebiquity