1. Lecture Notes in Computer Science;E. Ábraham Mumm,2003
2. Ahrendt, W., Baar, T., Beckert, B., Bubel, R., Giese, M., Hähnle, R., Menzel, W., Mostowski, W., Roth, A., Schlager, S., Schmitt, P.H.: The KeY tool. Technical Report 2003-5, Chalmers and Göteborg University (2003), http://i12www.ira.uka.de/~key
3. Lecture Notes in Computer Science;J. Berg van den,2001
4. Bergstra, J., Loots, M.: Empirical semantics for object-oriented programs. Artificial Intelligence Preprint Series nr. 007, Dep. Philosophy, Utrecht Univ. (1999), http://preprints.phil.uu.nl/aips/
5. Börger, E., Schulte, W.: Initialization problems in Java. Software—Concepts and Tools 20(4) (1999)