1. B. Algayres, Y. Lejeune, G. Hugonnet, and F. Hantz. The AVALON project:AVALidation Environment For SDL/MSC Descriptions. In 6th SDL Forum, Darmstadt, 1993.
2. Lect Notes Comput Sci;I. Burdonov,1991
3. I. Burdonov, A. Kossatchev, A. Petrenko, S. Cheng, H. Wong. Formal Specification and Verification of SOS Kernel, BNR/Nortel Design Forum, June 1996.
4. J. Derrick and E. Boiten. Testing Refining Test. Lecture Notes in Computer Science,1493, pp. 265–283.
5. R. Kramer. iContract-The Java Design by Contract Tool. Fourth conference on OO tec hnology and systems (COOTS), 1998.