Boldog születésnapot!
Abstract
Boldog sziiletOsnapot! Herzlichen Gliickwunsch! Happy Birthday? Professor Ldszl6 Szepesy Technical University of Budapest, Hungary On the occasion of your 70th birthday on April 15, 1998 the editors, the publisher and the readers of this journal wish you health and happiness for the future. We thank you for your continuous engagement and look forward to many more years of cooperation with you. Let us convey to you and your family our best wishes for every happiness and success in the future....