@article{MZM_1992_52_4_a11,
     author = {N. A. Strelkov},
     title = {Criterion for the asymptotic optimality of projection-grid subspaces},
     journal = {Matemati\v{c}eskie zametki},
     pages = {89--98},
     publisher = {mathdoc},
     volume = {52},
     number = {4},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_52_4_a11/}
}