@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},
     publisher = {mathdoc},
     volume = {9},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_1999__9__a4/}
}