@article{AUCMP_1983__24_2_a9,
     author = {Kepka, T.},
     title = {One-element extensions of distributive groupoids},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {73--77},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1983},
     mrnumber = {0733687},
     zbl = {0525.08001},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1983__24_2_a9/}
}