@mastersthesis {9376,
	title = {Presentations and complete rewriting systems for semigroups. (in Portuguese)},
	year = {2001},
	school = {University of Lisbon},
	type = {Master Thesis},
	address = {Lisbon},
	author = {Malheiro, A.},
	editor = {Gomes, G. M. S.}
}
