@conference {DesDes2006,
	title = {Internal event removal in Hierarchical and Concurrent State Diagrams},
	booktitle = {DESDes{\textquoteright}06 - 3rd IFAC Workshop on Discrete-Event System Design},
	year = {2006},
	note = {n/a},
	month = {26-28 September },
	address = {Rydzyna, Pol�nia},
	abstract = {n/a},
	author = {Anik{\'o} Costa and Lu\'{\i}s Gomes and Helder Francisco and Bruno Silva}
}
