@article{TRSPY_1976_142_a10,
     author = {A. A. Karatsuba},
     title = {Distribution of values of nonprincipal characters},
     journal = {Informatics and Automation},
     pages = {156--164},
     publisher = {mathdoc},
     volume = {142},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1976_142_a10/}
}