@article{1255454995, author = {Boas, R. P.}, title = {A variational method for trigonometric polynomials}, journal = {Illinois J. Math.}, volume = {3}, number = {1}, year = {1959}, pages = { 1-10}, language = {en}, url = {http://dml.mathdoc.fr/item/1255454995} }
Boas, R. P. A variational method for trigonometric polynomials. Illinois J. Math., Tome 3 (1959) no. 1, pp. 1-10. http://gdmltest.u-ga.fr/item/1255454995/