@article{RM_1975_30_3_a28,
     author = {L. D. Faddeev},
     title = {V. {P.~Maslov,} {Operator} methods (review)},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1975},
     volume = {30},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1975_30_3_a28/}
}