@article{00885483, title = {On a problem of Littlewood.}, journal = {Georgian Mathematical Journal}, volume = {3}, year = {1996}, pages = {121-132}, doi = {10.1007/BF02254735}, zbl = {0851.42007}, language = {en}, url = {http://dml.mathdoc.fr/item/00885483} }
Khazaradze, M. On a problem of Littlewood.. Georgian Mathematical Journal, Tome 3 (1996) pp. 121-132. doi : 10.1007/BF02254735. http://gdmltest.u-ga.fr/item/00885483/