@article{EXMA_2001__10_4_49860,
     author = {M\'asson, Gisli and Shapiro, Boris},
     title = {On polynomial eigenfunctions of a hypergeometric-type operator.},
     journal = {Experimental mathematics},
     pages = {609--618},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {2001},
     zbl = {1008.33008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_2001__10_4_49860/}
}