Programming Language Implementation and Logic Programming 3rd International Symposium, PLILP '91, Passau, Germany, August 26-28, 1991. Proceedings Maluszynski Jan Heftet / 1991 / Engelsk
Programming Language Implementation and Logic Programming International Workshop PLILP `90, Linköping, Sweden, August 20-22, 1990. Proceedings Deransart Pierre Heftet / 1990 / Engelsk
Reasoning Web First International Summer School 2005, Msida, Malta, July 25-29, 2005, Revised Lectures Eisinger Norbert Heftet / 2005 / Engelsk
Programming Languages Implementation and Logic Programming International Workshop PLILP '88, Orleans, France, May 16-18, 1988. Proceedings Deransart Pierre Heftet / 1989 / Engelsk
Principles and Practice of Semantic Web Reasoning International Workshop, PPSWR 2003, Mumbai, India, December 8, 2003, Proceedings Bry Francois Heftet / 2003 / Engelsk
Reasoning Web 4th International Summer School 2008, Venice Italy, September 7-11, 2008, Tutorial Lectures Baroglio Cristina Heftet / 2008 / Engelsk
