@article {,
	title = {Current Trends in Theoretical Computer Science. The Challenge of the New Century. Vol 1: Algorithms and Complexity},
	year = {2004},
	note = {Gheorghe Paun; Grzegorz Rozenberg; Arto Salomaa (eds.)},
	pages = {676},
	publisher = {World Scientific Publishing Company},
	address = {Singapur, Singapur},
	isbn = {981-238-966-0},
	author = {Gheorghe Paun and Grzegorz Rozenberg and Arto Salomaa}
}
