Spiro Michaylov, Frank Pfenning. Natural Semantics and Some of Its Meta-Theory in Elf. In Lars-Henrik Eriksson, Lars Hallnäs, Peter Schroeder-Heister, editors, Extensions of Logic Programming, Second International Workshop, ELP 91, Stockholm, Sweden, January 27-29, 1991, Proceedings. Volume 596 of Lecture Notes in Computer Science, pages 299-344, Springer, 1991.
Abstract is missing.