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@article{SF_1986__35_134880, author = {V.S. Krishnan and M. Levitan}, title = {Regular involution groupoids revisited.}, journal = {Semigroup forum}, pages = {353--368}, publisher = {mathdoc}, volume = {35}, year = {1986}, zbl = {0624.20038}, url = {http://geodesic.mathdoc.fr/item/SF_1986__35_134880/} }
V.S. Krishnan; M. Levitan. Regular involution groupoids revisited.. Semigroup forum, Tome 35 (1986), pp. 353-368. http://geodesic.mathdoc.fr/item/SF_1986__35_134880/