@article{1077476240, author = {Verblunsky, S.}, title = {A theorem on quartic polynomials}, journal = {Duke Math. J.}, volume = {17}, number = {1}, year = {1950}, pages = { 507-510}, language = {en}, url = {http://dml.mathdoc.fr/item/1077476240} }
Verblunsky, S. A theorem on quartic polynomials. Duke Math. J., Tome 17 (1950) no. 1, pp. 507-510. http://gdmltest.u-ga.fr/item/1077476240/