Logic Programming and Knowledge Representation Third International Workshop, LPKR'97, Port Jefferson, New York, USA, October 17, 1997, Selected Papers Moniz Pereira, Luis Heftet / 1998 / Engelsk
Non-Monotonic Extensions of Logic Programming ICLP '94 Workshop, Santa Margherita Ligure, Italy, June 17, 1994. Selected Papers Pereira, Louis M. Heftet / 1995 / Engelsk
Non-Monotonic Extensions of Logic Programming Second International Workshop NMELP '96, Bad Honnef, Germany September 5 - 6, 1996, Selected Papers Dix Juergen Heftet / 1997 / Engelsk
