@article{DAN_1962_144_5_a0,
     author = {D. L. Berman},
     title = {Classification of polynomial operations},
     journal = {Doklady Akademii Nauk},
     pages = {951--953},
     publisher = {mathdoc},
     volume = {144},
     number = {5},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_144_5_a0/}
}