@article{AMI_2006_33_a7,
     author = {Stamatis Koumandos},
     title = {Positive trigonometric sums and applications},
     journal = {Annales mathematicae et informaticae},
     pages = {77--91},
     publisher = {mathdoc},
     volume = {33},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2006_33_a7/}
}