@misc{RM_1989_44_4_a13,
     title = {Sergei {L'vovich} {Sobolev} (photo)},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {44},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_4_a13/}
}