Geodesic
On the least almost prime number in an arithmetic progression and the sequence $k^2x^2+1$
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 20 (1965) no. 4 
B. V. Levin. On the least almost prime number in an arithmetic progression and the sequence $k^2x^2+1$. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 20 (1965) no. 4. http://geodesic.mathdoc.fr/item/RM_1965_20_4_a11/
@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},
     year = {1965},
     volume = {20},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1965_20_4_a11/}
}
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%F RM_1965_20_4_a11

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