1. Institute of Electronic and Information Systems, Yaroslav-the-Wise Novgorod State University,Velikiy Novgorod,Russian
2. Pedagogical Institute Yaroslav-the-Wise Novgorod State University,Velikiy Novgorod,Russian
3. Todor Kableshkov University of Transport,Faculty of Machinery and Construction Technologies in Transport,Sofia,Bulgaria
4. Todor Kableshkov University of Transport,Faculty of Telecommunication and Electrical Equipment in Transport,Sofia,Bulgaria
5. Olimex Ltd,Plovdiv,Bulgaria