@techreport{R-89-03,
TITLE = {Fail Substitutions for Negation as Failure},
AUTHOR = {Jan Maluszynski and Torbj{\"o}rn N{\"a}slund },
YEAR = {1989},
NUMBER = {R-89-03},
INSTITUTION = ida,
ADDRESS = idaaddr,
ABSTRACT = {},
IDANR = {LiTH-IDA-R-89-03},
NOTE = {Also in Proc. of the North American Conference on Logic Programming 89, Cleveland, Ohio, USA}