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@article{BAG_1984__17_138263, author = {Barbara Schultz}, title = {Gruppoide und boolesche {Strukturen}}, journal = {Beitr\"age zur Algebra und Geometrie}, pages = {31--60}, publisher = {mathdoc}, volume = {17}, year = {1984}, language = {en}, url = {http://geodesic.mathdoc.fr/item/BAG_1984__17_138263/} }
Barbara Schultz. Gruppoide und boolesche Strukturen. Beiträge zur Algebra und Geometrie, Tome 17 (1984), pp. 31-60. http://geodesic.mathdoc.fr/item/BAG_1984__17_138263/