@article{FPM_2002_8_3_a1,
     author = {O. N. Vasilenko},
     title = {On the solvability of the discrete logarithm problem in residue classes},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {647--653},
     year = {2002},
     volume = {8},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2002_8_3_a1/}
}