@article{UZERU_1999_2_a1,
     author = {A. A. Mashuryan and G. R. Asatrian},
     title = {About classification of arithmetical formulas on the basis of classification of $M$-arithmetics},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {12--16},
     publisher = {mathdoc},
     number = {2},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_1999_2_a1/}
}