1. University of Zielona Góra , Faculty of Civil Engineering, Architecture and Environmental Engineering , Str. Licealna 9, 65-417 Zielona Góra , Poland
2. Pope John Paul II State School of Higher Education in Biala Podlaska , 95/97 Sidorska Str. Biala Podlaska 21-500 , Poland
3. Brest State Technical University , 267 Moskovskaya Str. Brest 224017 , Belarus
4. Białystok University of Technology , 45E Wiejska Str. Bialystok 15-351, Poland