Almelida, J.B Rigorous sofrware development: an introduction to program verifacation Jose Bacelar ASlmeida, Maria Joao Frade, Jorge Sosa Pinto and Simao Melo de Sousa - London: Springer; 2011 - vii, 263p.P: ill.; 22cm. Includes index ISBN: 9780857290175 LC Class. No.: DUCE 76.76.W47