On-line since 04/15/2004
Current version: 6, on-line since 03/03/2014

Special thanks

A special thank to Marco for his continuous support and all his valuable comments and suggestions.
Credits to Alex Handin for the following pictures: cover 1, cover 4, and logo.
Credits to Pietro Artoni for the following picture: cover 2.


The design and implementation of any part of this site, unless explicitly stated, are the work of my ability and therefore their use by third persons is a violation of copyright.
All links refer to sites whose rights belong to their respective owners; please contact me and report any copyright violation and I will provide asap.


first version (on-line until 09/30/2005)
second version (on-line until 09/30/2007)
third version (on-line until 09/30/2010)
fourth version (on-line until 09/30/2012)
fifth version (on-line until 02/28/2014)