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@article{MZM_1972_11_3_a3, author = {A. S. Fainleib}, title = {On the relative primality of $n$ and $f(n)$}, journal = {Matemati\v{c}eskie zametki}, pages = {259--268}, publisher = {mathdoc}, volume = {11}, number = {3}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_3_a3/} }
A. S. Fainleib. On the relative primality of $n$ and $f(n)$. Matematičeskie zametki, Tome 11 (1972) no. 3, pp. 259-268. http://geodesic.mathdoc.fr/item/MZM_1972_11_3_a3/