@article{UZKU_1968_128_3_a8,
     author = {A. P. Norden},
     title = {Congruences and dual numbers},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {82--98},
     year = {1968},
     volume = {128},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1968_128_3_a8/}
}