@article{DAN_1969_186_5_a1,
     author = {\'E. B. Bykhovskii},
     title = {Certain topological questions, for finite-dimensional vector fields, connected with the theory of discontinuous solutions of systems of quasilinear conservation laws},
     journal = {Doklady Akademii Nauk},
     pages = {994--997},
     publisher = {mathdoc},
     volume = {186},
     number = {5},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_186_5_a1/}
}