@article{SMJ2_1999_25_4_a1,
     author = {Nasr-Isfahani, A.},
     title = {Representations and {Positive} {Definite} {Functions} on {Hypergroups}},
     journal = {Serdica Mathematical Journal},
     pages = {283--296},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_1999_25_4_a1/}
}