@article{IM2_1980_15_2_a8,
     author = {A. L. Semenov},
     title = {On certain extensions of the arithmetic of addition of natural numbers},
     journal = {Izvestiya. Mathematics},
     pages = {401--418},
     year = {1980},
     volume = {15},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1980_15_2_a8/}
}