@article{RSMUP_1964__34__176_0,
     author = {Abdul-Halim, N. and Al-Salam, W. A.},
     title = {A characterization of the {Laguerre} polynomials},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {176--179},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {34},
     year = {1964},
     mrnumber = {166422},
     zbl = {0124.03504},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1964__34__176_0/}
}