@article{SM_1993_76_1_a7,
     author = {S. V. Onipchuk},
     title = {Regular semihypergroups},
     journal = {Sbornik. Mathematics},
     pages = {155--164},
     publisher = {mathdoc},
     volume = {76},
     number = {1},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1993_76_1_a7/}
}