Gilles Barthe, Maria João Frade. Constructor Subtyping. In S. Doaitse Swierstra, editor, Programming Languages and Systems, 8th European Symposium on Programming, ESOP 99, Held as Part of the European Joint Conferences on the Theory and Practice of Software, ETAPS 99, Amsterdam, The Netherlands, 22-28 March, 1999, Proceedings. Volume 1576 of Lecture Notes in Computer Science, pages 109-127, Springer, 1999. [doi]
Abstract is missing.