@Article{jakel2003beitrag,
	author = {Jäkel, Holger and Kiencke, Uwe},
	title = {Ein Beitrag zur Systemtheorie ereignisdiskreter Systeme–Teil 2: Der Bildbereich (A Note on System Theoretic Elements of Discrete Event Systems–Part 2: Range Domain)},
	journal = {at-Automatisierungstechnik},
	volume = {51},
	number = {3},
	pages = {128–135},
	year = {2003},
}