@article{journals/mscs/RosebrughSW04,
	title = {Minimisation and minimal realisation in Span(Graph).},
	author = {Robert D. Rosebrugh and Nicoletta Sabadini and Robert F. C. Walters},
	journal = {Mathematical Structures in Computer Science},
	number = {5},
	pages = {685-714},
	url = {http://dblp.uni-trier.de/db/journals/mscs/mscs14.html#RosebrughSW04},
	volume = {14},
	year = {2004},
	biburl = {http://www.bibsonomy.org/bibtex/26bf1f448c7e77442da39de052a483e36/dblp},
	description = {dblp},
	ee = {http://dx.doi.org/10.1017/S096012950400430X}, date = {2006-07-07},
	keywords = {dblp }
}