Gunter Saake, Ralf Jungclaus, Cristina Sernadas. Abstract Data Type Semantics for Many-Sorted Object Query Algebras. In Bernhard Thalheim, János Demetrovics, Hans-Detlef Gerhardt, editors, MFDBS 91, 3rd Symposium on Mathematical Fundamentals of Database and Knowledge Bases Systems, Rostock, Germany, May 6-9, 1991, Proceedings. Volume 495 of Lecture Notes in Computer Science, pages 291-307, Springer, 1991. [doi]
Abstract is missing.