Following persons/group cooperate with the project: Iževskij Gosudarstvennyj Techničeskij Universitet, Iževsk/Udmuria, Russ. Federation Prof. Dr. Viktor Baranov Univerzita Komenského, Bratislava, Slovakia Dr. L’ubor Matejko Plovdivski Universitet, Bulgaria Dr. Maria Schnitter Others Prof. Dr. Ioannis Tarnanidis (Thessaloniki, Greece) Dr. Elena Velkovska (Rome, Italy)