@article{AUCMP_1999__40_2_a0,
     author = {De Salvo, M.},
     title = {On the partial semi-hypergroups with empty diagonal},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {3--19},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1999},
     mrnumber = {1751538},
     zbl = {0962.20054},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1999__40_2_a0/}
}