1. University of Technology and Humanities in Radom , Department of Thermal Technology , Stasieckiego Street 54, 26-600 Radom , Poland , tel.: +48 48 3617149
2. University of Zagreb , Faculty of Mechanical Engineering and Naval Architecture , Ivana Lučića Street 5, 10002 Zagreb , Croatia tel.: +385 01 6168377, +385 01 6168308