@article{RM_1965_20_4_a11,
     author = {B. V. Levin},
     title = {On the least almost prime number in an arithmetic progression and the sequence $k^2x^2+1$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1965_20_4_a11/}
}