@article{IM2_1980_15_1_a5,
     author = {M. M. Petechuk},
     title = {The sum of the values of the divisor function in arithmetic progressions whose difference is a~power of an odd prime},
     journal = {Izvestiya. Mathematics },
     pages = {145--160},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1980_15_1_a5/}
}