Maurice Bruynooghe Jaan Penjam Programming Language Implementation and Logic Programming, 5th International Symposium, PLILP'93, Tallinn, Estonia, August 25-27, 1993, Proceedings PLILP Lecture Notes in Computer Science 714 Springer 1993 3-540-57186-8 https://doi.org/10.1007/3-540-57186-8 db/conf/plilp/plilp93.html