@article{RM_1961_16_2_a0,
     author = {N. I. Akhiezer and I. G. Petrovskii},
     title = {S.\,N.~Bernshtein's contribution to the theory of partial differential equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--15},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1961},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1961_16_2_a0/}
}