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@article{DMGAA_2004_24_2_a1, author = {Chajda, Ivan}, title = {A groupoid characterization of {Boolean} algebras}, journal = {Discussiones Mathematicae. General Algebra and Applications}, pages = {177--184}, publisher = {mathdoc}, volume = {24}, number = {2}, year = {2004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/DMGAA_2004_24_2_a1/} }
Chajda, Ivan. A groupoid characterization of Boolean algebras. Discussiones Mathematicae. General Algebra and Applications, Tome 24 (2004) no. 2, pp. 177-184. http://geodesic.mathdoc.fr/item/DMGAA_2004_24_2_a1/