T. S. E. Maibaum. Conservative Extensions, Interpretations Between Theories and All That!. In Michel Bidoit, Max Dauchet, editors, TAPSOFT 97: Theory and Practice of Software Development, 7th International Joint Conference CAAP/FASE, Lille, France, April 14-18, 1997, Proceedings. Volume 1214 of Lecture Notes in Computer Science, pages 40-66, Springer, 1997.
Abstract is missing.