1. Lindland, O., Sindre, G., Sølvberg, A.: Understanding quality in conceptual modeling. IEEE Softw. 11, 42–49 (1994)
2. Alexander, C.: The Timeless Way of Building, vol. 1. Oxford University Press, Oxford (1979)
3. The Pedagogical Patterns Project. http://www.pedagogicalpatterns.org (2010)
4. Commission, E.: The E-Len Project. http://www2.tisip.no/E-LEN/patterns_info.php (2008)
5. Rising, L. (ed.): Design Patterns in Communications Software. Cambridge University Press, New York, NY (2001)