@article{ZNSL_1998_254_a11,
     author = {O. M. Fomenko},
     title = {On the mean number of solutions of certain congruences},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {192--206},
     publisher = {mathdoc},
     volume = {254},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1998_254_a11/}
}