@article{ZNSL_1975_50_a6,
     author = {N. V. Proskurin},
     title = {A~theorem on distribution of quadratic residues applicable in the {Linnik's} ergodic method},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {169--178},
     publisher = {mathdoc},
     volume = {50},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1975_50_a6/}
}