@article{RM_1989_44_4_a4,
     author = {V. I. Arnol'd and M. I. Vishik and Yu. S. Ilyashenko and A. S. Kalashnikov and V. A. Kondrat'ev and S. N. Kruzhkov and E. M. Landis and V. M. Millionshchikov and O. A. Oleinik and A. F. Filippov and M. A. Shubin},
     title = {Some unsolved problems in the theory of differential equations and mathematical physics},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {157--171},
     publisher = {mathdoc},
     volume = {44},
     number = {4},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_4_a4/}
}