@article{TRSPY_1987_180_a42,
     author = {V. L. Velikin},
     title = {Approximation in {a~Banach} space by a~convergent sequence of subspaces of fixed dimension},
     journal = {Informatics and Automation},
     pages = {81--82},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a42/}
}