@article{MZ_1988__198_3_173934,
     author = {Michael Voit},
     title = {Positive {Characters} on {Commutative} {Hypergroups} and {Some} applications.},
     journal = {Mathematische Zeitschrift},
     pages = {405--422},
     publisher = {mathdoc},
     volume = {198},
     number = {3},
     year = {1988},
     zbl = {0677.43002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1988__198_3_173934/}
}