Barbara Liskov. Keynote address - data abstraction and hierarchy. In Leigh R. Power, Zvi Weiss, editors, Addendum to the Proceedings on Object-Oriented Programming Systems, Languages and Applications, OOPSLA 1987 Addendum, Orlando, Florida, USA, October 4-8, 1987. pages 17-34, ACM, 1987. [doi]
Abstract is missing.