@article{10_4064_cm116_1_2,
     author = {Rupert Lasser},
     title = {Point derivations on the $L^1$-algebra of
 polynomial hypergroups},
     journal = {Colloquium Mathematicum},
     pages = {15--30},
     publisher = {mathdoc},
     volume = {116},
     number = {1},
     year = {2009},
     doi = {10.4064/cm116-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm116-1-2/}
}