Lyubomir Lazov Rezekne Academy of Technologies Latvia
Edmunds Teirumnieks Rezekne Academy of Technologies Latvia
Erika Teirumnieka Rezekne Academy of Technologies Latvia
Pavel Cacivkin Rezekne Academy of Technologies Latvia
Nikolay Angelov Technical University of Gabrovo Bulgaria
Tsanko Karadzhov Technical University of Gabrovo Bulgaria