@article{ZVMMF_1971_11_5_a12,
     author = {V. V. Tumasonis},
     title = {A system of equivalent transformations of expressions},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1272--1281},
     publisher = {mathdoc},
     volume = {11},
     number = {5},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1971_11_5_a12/}
}