%0 Journal Article %A N. V. Proskurin %T A~theorem on distribution of quadratic residues applicable in the Linnik's ergodic method %J Zapiski Nauchnykh Seminarov POMI %D 1975 %P 169-178 %V 50 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1975_50_a6/ %G ru %F ZNSL_1975_50_a6