@article{10_4153_CJM_1976_082_8,
     author = {Askey, Richard and Ismail, Mourad E. H.},
     title = {Permutation {Problems} and {Special} {Functions}},
     journal = {Canadian journal of mathematics},
     pages = {853--874},
     year = {1976},
     volume = {28},
     number = {4},
     doi = {10.4153/CJM-1976-082-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-082-8/}
}