@misc{RM_1970_25_5_a21,
     title = {Vitalii {Arsen'evich} {Ditkin} (photo)},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {25},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1970_25_5_a21/}
}