@article{RM_1971_26_2_a0,
     author = {M. V. Keldysh and M. D. Millionshchikov and V. A. Kotel'nikov and A. V. Peive},
     title = {Greetings to {Ivan} {Georgievich} {Petrovskii} on the occasion of his seventieth birthday},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {3--4},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1971_26_2_a0/}
}