@article{10_4153_CJM_2009_007_4,
     author = {Green, Ben and Konyagin, Sergei},
     title = {On the {Littlewood} {Problem} {Modulo} a {Prime}},
     journal = {Canadian journal of mathematics},
     pages = {141--164},
     year = {2009},
     volume = {61},
     number = {1},
     doi = {10.4153/CJM-2009-007-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2009-007-4/}
}