Authors
J. Špička
Research and Testing Insitute Plzeň, Tylova 1581/46, 301 00, Plzeň, Czech Republic
L. Kander
Material and Metallurgical Research, Ltd., Pohraniční 31/639, 703 00 Ostrava-Vítkovice, Czech Republic;
P. Čížek
Material and Metallurgical Research, Ltd., Pohraniční 31/639, 703 00 Ostrava-Vítkovice, Czech Republic
