@article{RM_1961_16_3_a2,
     author = {P. S. Aleksandrov and A. D. Myshkis and O. A. Oleinik},
     title = {Ivan {Georgievich} {Petrovskii} (on the occasion of his sixtieth birthday)},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {131--149},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1961},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1961_16_3_a2/}
}