Joachim Niehren and
Tim Priesnitz. Entailment of Non-Structural Subtype Constraints. In Asian Computing Science Conference, December 10-12, (1742):251-265, Springer, Phuket, Thailand, 1999. [Abstract] google [Annote]
Tim Priesnitz. Entailment von nicht-strukturellen Teiltyp-Constraints. Master's thesis, Universität des Saarlandes, Fachbereich Informatik, Saarbrücken, 2000. [Abstract] google [Annote]