@article{1183499466, author = {Walsh, J. L.}, title = {A mean value theorem for polynomials and harmonic polynomials}, journal = {Bull. Amer. Math. Soc.}, volume = {42}, number = {12}, year = {1936}, pages = { 923-930}, language = {en}, url = {http://dml.mathdoc.fr/item/1183499466} }
Walsh, J. L. A mean value theorem for polynomials and harmonic polynomials. Bull. Amer. Math. Soc., Tome 42 (1936) no. 12, pp. 923-930. http://gdmltest.u-ga.fr/item/1183499466/