@misc{RM_1971_26_1_a18,
     title = {Nikolai {Vladimirovich} {Efimov} (photo)},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1971_26_1_a18/}
}