Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1991_49_2_a17, author = {S. V. Konyagin}, title = {A~problem of {Littlewood}}, journal = {Matemati\v{c}eskie zametki}, pages = {143--144}, publisher = {mathdoc}, volume = {49}, number = {2}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_2_a17/} }
S. V. Konyagin. A~problem of Littlewood. Matematičeskie zametki, Tome 49 (1991) no. 2, pp. 143-144. http://geodesic.mathdoc.fr/item/MZM_1991_49_2_a17/