Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{AUCMP_1975__16_2_a7, author = {Kepka, Tom\'a\v{s}}, title = {Normal congruence relations on division groupoids}, journal = {Acta Universitatis Carolinae. Mathematica et Physica}, pages = {89--95}, publisher = {mathdoc}, volume = {16}, number = {2}, year = {1975}, mrnumber = {0382485}, zbl = {0319.20066}, language = {en}, url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1975__16_2_a7/} }
Kepka, Tomáš. Normal congruence relations on division groupoids. Acta Universitatis Carolinae. Mathematica et Physica, Tome 16 (1975) no. 2, pp. 89-95. https://geodesic-test.mathdoc.fr/item/AUCMP_1975__16_2_a7/