@article{MZ_1987__195_183703,
     author = {Richard C. Vrem},
     title = {Connectivity and {Supernormality} {Results} for {Hypergroups.}},
     journal = {Mathematische Zeitschrift},
     pages = {419--428},
     publisher = {mathdoc},
     volume = {195},
     year = {1987},
     zbl = {0627.22001},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__195_183703/}
}