@article{GDZPPN002333015, title = {A class of positive trigonometric sums. II.}, journal = {Mathematische Annalen}, volume = {283}, year = {1989}, pages = {57-74}, zbl = {0663.42002}, url = {http://dml.mathdoc.fr/item/GDZPPN002333015} }
Brown, Gavin; Wilson, David C. A class of positive trigonometric sums. II.. Mathematische Annalen, Tome 283 (1989) pp. 57-74. http://gdmltest.u-ga.fr/item/GDZPPN002333015/