@article{DM_2007_19_2_a4,
     author = {I. A. Popovyan},
     title = {Optimal logarithmic functions for lifting of a~solution of an exponential congruence},
     journal = {Diskretnaya Matematika},
     pages = {51--62},
     year = {2007},
     volume = {19},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2007_19_2_a4/}
}