@article{SM_1980_37_2_a0,
     author = {S. V. Konyagin},
     title = {On the number of solutions of an $n$th degree congruence with one unknown},
     journal = {Sbornik. Mathematics},
     pages = {151--166},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1980_37_2_a0/}
}