ISBN Print: 0-8493-9922-X
DOI: 10.1615/IHPC1990v2.40 pages 41-48
I. Novotna National Research Institute for Machine Design, Prague 9 - Bechovice, Czechoslovakia
J. Nassler Charles University, St. Hlavova 2030, Prague 2, Czechoslovakia
M. Zelko Air Technique Enterprise, Nove Mesto nad Vahom, Czechoslovakia