@article{10_4007_annals_2008_167_1109,
     author = {Peter Borwein and Tam\'as Erd\'elyi and Ron Ferguson and Richard Lockhart},
     title = {On the zeros of cosine polynomials: solution to a problem of {Littlewood}},
     journal = {Annals of mathematics},
     pages = {1109--1117},
     publisher = {mathdoc},
     volume = {167},
     number = {3},
     year = {2008},
     doi = {10.4007/annals.2008.167.1109},
     mrnumber = {2415396},
     zbl = {1186.11045},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2008.167.1109/}
}