@article{MZM_1989_45_3_a14,
     author = {V. P. Maslov},
     title = {A conjecture on the formation of the structure of a front of a shock wave},
     journal = {Matemati\v{c}eskie zametki},
     pages = {120--123},
     year = {1989},
     volume = {45},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_3_a14/}
}