@article{DE_1981_17_4_a16,
     author = {S. B. Popov and Yu. P. Popov},
     title = {Some singularities of a solution of equations of gas dynamics by finite-difference methods},
     journal = {Differencialʹnye uravneni\^a},
     pages = {719--731},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_4_a16/}
}