@article{TRSPY_1987_180_a31,
     author = {A. P. Bulanov},
     title = {Multiple powers and local approximations},
     journal = {Informatics and Automation},
     pages = {65--67},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a31/}
}