@article{ETNA_1999__9__a4,
     author = {Lorente,  Miguel},
     title = {Creation and annihilation operators for orthogonal polynomials of continuous and discrete variables},
     journal = {Electronic transactions on numerical analysis},
     pages = {102--111},
     year = {1999},
     volume = {9},
     zbl = {0952.33005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_1999__9__a4/}
}