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@article{PIM_1973_N_S_15_29_a1, author = {Branka P. Alimpi\'c}, title = {Ballanced {Laws} {On} {GD-Groupoids}}, journal = {Publications de l'Institut Math\'ematique}, pages = {21 }, publisher = {mathdoc}, volume = {_N_S_15}, number = {29}, year = {1973}, url = {http://geodesic.mathdoc.fr/item/PIM_1973_N_S_15_29_a1/} }
Branka P. Alimpić. Ballanced Laws On GD-Groupoids. Publications de l'Institut Mathématique, _N_S_15 (1973) no. 29, p. 21 . http://geodesic.mathdoc.fr/item/PIM_1973_N_S_15_29_a1/