@conference {etfa/Gomes06,
	title = {Removing ill-structured arcs in Hierarchical and Concurrent State Diagrams},
	booktitle = {ETFA},
	year = {2006},
	note = {n/a},
	pages = {1230-1237},
	abstract = {n/a},
	author = {Lu\'{\i}s Gomes and Anik{\'o} Costa}
}
