Nikolay Todorov Dolchinkov National Military University „Vasil Levski“, Veliko Tarnovo, Bulgaria, National Research University "Moscow Power Engineering Institute", Moscow Bulgaria
Lyubomir Lazov Rezekne Academy of Technologies, Latvia Latvia
Jordan Shterev Ivanov National Military University „Vasil Levski“, Veliko Tarnovo, Bulgaria Bulgaria
Stelena Dimitrova Lilyanova National Military University „Vasil Levski“, Veliko Tarnovo, Bulgaria Bulgaria
Antons Pacejs Rezekne Academy of Technologies, Faculty of Engineering Latvia