$P$-hypergoupes
Acta Universitatis Carolinae. Mathematica et Physica, Tome 28 (1987) no. 1, pp. 15-20.
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@article{AUCMP_1987__28_1_a3, author = {Vougiouklis, Th. and Konguetsof, L.}, title = {$P$-hypergoupes}, journal = {Acta Universitatis Carolinae. Mathematica et Physica}, pages = {15--20}, publisher = {mathdoc}, volume = {28}, number = {1}, year = {1987}, mrnumber = {0929262}, zbl = {0658.20044}, language = {en}, url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1987__28_1_a3/} }
Vougiouklis, Th.; Konguetsof, L. $P$-hypergoupes. Acta Universitatis Carolinae. Mathematica et Physica, Tome 28 (1987) no. 1, pp. 15-20. https://geodesic-test.mathdoc.fr/item/AUCMP_1987__28_1_a3/