1. N.N.: About the Apache HTTP Server Project, http://httpd.apache.org/ABOUT_APACHE.html , 1999 (last visited March 2002)
2. Bandinelli, S., Fuggetta, A., and Grigolli, S. (1993). Process Modeling-in-the-large with SLANG. In IEEE Proceedings of the 2nd Int. Conf. on the Software Process, Berlin (Germany).
3. Kent Beck: Extreme Programming Explained: Embrace Change, Addison-Wesley Pub Co, 1999, ISBN: 0201616416
4. Kent Beck, Martin Fowler: Planning Extreme Programming, Addison-Wesley Pub Co, 2000, ISBN: 0201710919
5. Conradi, R., Hagaseth, M., Larsen, J. O., Nguyen, M., Munch, G., Westby, P., and Zhu, W. (1994). EPOS: Object-Oriented and Cooperative Process Modeling. In PROMOTER book: Anthony Finkelstein, Jeff Kramer and Bashar A. Nuseibeh (Eds.): Software Process Modeling and Technology, 1994. Advanced Software Development Series, Research Studies Press Ltd. (John Wiley).