@article{MZM_1980_28_1_a15,
     author = {V. A. Levashov},
     title = {Operator orthogonal complements},
     journal = {Matemati\v{c}eskie zametki},
     pages = {127--130},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_1_a15/}
}