@article{CLTM_1964_1964_1_a12,
     author = {Al-Salam, W. A.},
     title = {On the orthogonality of sorne systems of polynornials.},
     journal = {Collectanea mathematica},
     publisher = {mathdoc},
     number = {2-3},
     year = {1964},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1964_1964_1_a12/}
}