@article{DAN_1961_136_2_a5,
     author = {A. F. Lavrik},
     title = {The number of $k$-twin primes lying on an interval of a given length},
     journal = {Doklady Akademii Nauk},
     pages = {281--283},
     publisher = {mathdoc},
     volume = {136},
     number = {2},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_136_2_a5/}
}