@article{DAN_1960_132_6_a8,
     author = {A. F. Lavrik},
     title = {Distribution of $k$-twins of primes},
     journal = {Doklady Akademii Nauk},
     pages = {1258--1260},
     year = {1960},
     volume = {132},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_132_6_a8/}
}