@article{MAN_1989__285_1_164584,
     author = {Gavin Brown and David C. Wilson},
     title = {A class of positive trigonometric sums. {II.}},
     journal = {Mathematische Annalen},
     pages = {57--74},
     publisher = {mathdoc},
     volume = {285},
     number = {1},
     year = {1989},
     zbl = {0663.42002},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164584/}
}