%0 Journal Article %A J. C. Merlo %T On orthogonal polynomials and second-order linear differential operators %J Annales Polonici Mathematici %D 1967 %P 69-79 %V 19 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-19-1-69-79/ %R 10.4064/ap-19-1-69-79 %G en %F 10_4064_ap_19_1_69_79