@article{1183503563, author = {Krall, H. L.}, title = {On derivatives of orthogonal polynomials. II}, journal = {Bull. Amer. Math. Soc.}, volume = {47}, number = {11}, year = {1941}, pages = { 261-264}, language = {en}, url = {http://dml.mathdoc.fr/item/1183503563} }
Krall, H. L. On derivatives of orthogonal polynomials. II. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 261-264. http://gdmltest.u-ga.fr/item/1183503563/