%0 Journal Article %A Koepf, Wolfram %T Orthogonal polynomials and recurrence equations, operator equations and factorization %J Electronic transactions on numerical analysis %D 2007 %P 113-123 %V 27 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2007__27__a4/ %G en %F ETNA_2007__27__a4