@article{DAN_1984_279_5_a3,
     author = {A. A. Karatsuba},
     title = {Quadratic residues and nonresidues in sparse sequences},
     journal = {Doklady Akademii Nauk},
     pages = {1044--1046},
     year = {1984},
     volume = {279},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_279_5_a3/}
}