@article{BUMI_1950_3_5_2_125_0, author = {Otto Sz\'asz}, title = {On the relative extrema of ultraspherical polynomials}, journal = {Bollettino dell'Unione Matematica Italiana}, volume = {5}, year = {1950}, pages = {125-127}, zbl = {0039.07602}, mrnumber = {37944}, language = {en}, url = {http://dml.mathdoc.fr/item/BUMI_1950_3_5_2_125_0} }
Szász, Otto. On the relative extrema of ultraspherical polynomials. Bollettino dell'Unione Matematica Italiana, Tome 5 (1950) pp. 125-127. http://gdmltest.u-ga.fr/item/BUMI_1950_3_5_2_125_0/