@article{VMUMM_1967_6_a7,
     author = {S. A. Stepanov},
     title = {The approximation of an algebraic number by algebraic numbers of a special form},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {78--86},
     publisher = {mathdoc},
     number = {6},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1967_6_a7/}
}