@book{Barbut70,
	title = {L'ordre et la classification},
	editor = {M. Barbut and B. Monjardet},
	publisher = {Hachette},
	series = {Alg�bre et combinatoire, tome II},
	year = {1970},
	biburl = {http://www.bibsonomy.org/bibtex/2b2df839513aceb58c4a678ba69ca108f/stumme},
	keywords = {FCA OntologyHandbook }
}