@book{239423,
	author = {International Conference on Semigroups and Formal Languages and Andre, Jorge M. and Universidade de Lisboa.},
	title = {Semigroups and formal languages},
	publisher = {World Scientific,},
	year = {c2007.},
	address = {Singapore ;},
	url = {https://ebookcentral.proquest.com/lib/kuct-ebooks/detail.action?docID=312385}
}