@article{MT_1994_24_a1,
     author = {A. M. Blokhin and D. A. Krymskikh},
     title = {Strong discontinuities in a superfluid},
     journal = {Matemati\v{c}eskie trudy},
     pages = {20--62},
     publisher = {mathdoc},
     volume = {24},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1994_24_a1/}
}