1. Warsaw University of Technology, Faculty of Building Services, Hydro and Environmental Engineering, ul. Nowowiejska 20, 00-653 Warsaw, Poland
2. Brno University of Technology, Faculty of Civil Engineering, Veverí 331/95, 602 00 Brno, Czech Republic
3. Energoprojekt-Warszawa SA, Al. Niepodległosci 58, 02-626 Warsaw, Poland