Krist´ına Budajov´a1, J´ulius Czap2 §
1Department of Aerodynamics and Simulations
Faculty of Aeronautics
Technical University of Koˇsice
Rampov´a 7, SK-041 21 Koˇsice, SLOVAKIA
2Department of Applied Mathematics and Business Informatics
Faculty of Economics
Technical University of Koˇsice
B. Nˇemcovej 32, SK-040 01 Koˇsice, SLOVAKIA