Integrated Formal Methods 9th International Conference, IFM 2012, Pisa, Italy, June 18-21, 2012. Proceedings Derrick John Heftet / 2012 / Engelsk
ZB 2005: Formal Specification and Development in Z and B 4th International Conference of B and Z Users, Guildford, UK, April 13-15, 2005, Proceedings Treharne Helen Heftet / 2005 / Engelsk
