1. Lecture Notes in Computer Science;G. Bergmann,2008
2. Bracha, G.: The Java Tutorials – Lesson: Generics, http://java.sun.com/docs/books/tutorial/extra/generics (Last checked: March 12, 2010)
3. Cormen, T.H., Leiserson, C.E., Rivest, R.L., Stein, C.: Introduction to Algorithms, 3rd edn. MIT Press, Cambridge (2009)
4. Corradini, A., Ehrig, H., Heckel, R., Löwe, M., Montanari, U., Rossi, F.: Algebraic approaches to graph transformation, part I: Basic concepts and double pushout approach. In: Rozenberg [17], ch. 3, pp. 163–245
5. Lecture Notes in Computer Science;F. Drewes,2006