Tsutomu Kobayashi, Fuyuki Ishikawa, Shinichi Honiden. Refactoring Refinement Structure of Event-B Machines. In John S. Fitzgerald, Constance L. Heitmeyer, Stefania Gnesi, Anna Philippou, editors, FM 2016: Formal Methods - 21st International Symposium, Limassol, Cyprus, November 9-11, 2016, Proceedings. Volume 9995 of Lecture Notes in Computer Science, pages 444-459, 2016. [doi]