Steffen van Bakel, Ugo de Liguoro. Subtyping Object and Recursive Types Logically. In Mario Coppo, Elena Lodi, G. Michele Pinna, editors, Theoretical Computer Science, 9th Italian Conference, ICTCS 2005, Siena, Italy, October 12-14, 2005, Proceedings. Volume 3701 of Lecture Notes in Computer Science, pages 66-80, Springer, 2005. [doi]
Abstract is missing.