Marcel Vinicius Medeiros Oliveira Jim Woodcock Formal Methods: Foundations and Applications, 12th Brazilian Symposium on Formal Methods, SBMF 2009, Gramado, Brazil, August 19-21, 2009, Revised Selected Papers 5902 2009 http://dx.doi.org/10.1007/978-3-642-10452-7 978-3-642-10451-0 SBMF Lecture Notes in Computer Science Springer db/conf/sbmf/sbmf2009.html