@article{MZM_1999_65_3_a12,
     author = {O. Yu. Shvedov},
     title = {On the canonical {Maslov} operator in abstract spaces},
     journal = {Matemati\v{c}eskie zametki},
     pages = {437--456},
     publisher = {mathdoc},
     volume = {65},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1999_65_3_a12/}
}