janette.brezinova@tuke.sk
anna.guzanova@tuke.sk
dagmar.draganovska@tuke.sk
marian.egri@slovnaft.sk
© 2014 Janette Brezinová, Anna Guzanová, Dagmar Draganovská, Marián Egri, published by Bialystok University of TechnologyThis work is licensed under the Creative Commons License.