@conference {TGyK89,
	title = {{SYS-DL}, a system development language supporting software quality assurance},
	booktitle = {First Finnish-Hungarian Workshop on Programming Languages and Software Tools},
	year = {1989},
	month = {aug},
	pages = {307-317},
	author = {J. Toczki and Tibor Gyim{\'o}thy and Kocsis, F.}
}
