@article{RM_1996_51_1_a0,
     author = {V. I. Arnol'd},
     title = {Topological problems of the theory of wave propagation},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--47},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1996_51_1_a0/}
}