1. Faculty of Environmental Engineering, Lublin University of Technology, ul. Nadbystrzycka 40B, 20-618 Lublin, Poland, phone +48 81 538 44 30
2. Institute of Environmental Engineering, Off-Campus Faculty of Social Sciences in Stalowa Wola, The John Paul II Catholic University of Lublin, ul. Ofiar Katynia 6A, 37-450 Stalowa Wola, Poland, phone +48 15 642 25 33, fax +48 15 842 49 51