About the author
 

Name: Dimiter Dimitrov Dobrev

 Address: P. O. Box 1274
 Sofia 1000, Bulgaria
 Telephone: +(359) (2) 979 2862
 E-mail:  prolog@2-box.net
 

This program is made with the help of:
 Angel Genov
 Anton Zinoviev
 Antonio Maschio
 Borislav Rizov
 Dimitar Guelev
 Plamen Sharapanov
 Radoslav Nikolov
 artist Konstantin Lakov

Special thanks for the support to
Prof. Dimiter Skordev