@Article{jakel2003beitrag_at,
	author = {Jäkel, Holger and Kiencke, Uwe},
	title = {Ein Beitrag zur Systemtheorie ereignisdiskreter Systeme–Teil 1: Der Zeitbereich (A Note on System Theoretic Elements of Discrete Event Systems–Part 1: Time Domain)},
	journal = {at-Automatisierungstechnik},
	volume = {51},
	number = {2},
	pages = {78–85},
	year = {2003},
}