On the behavior of characteristics of equations of mixed type with a closed line of degeneracy
Differencialʹnye uravneniâ, Tome 18 (1982) no. 3, pp. 533-534.

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     author = {A. G. Kuz'min},
     title = {On the behavior of characteristics of equations of mixed type with a closed line of degeneracy},
     journal = {Differencialʹnye uravneni\^a},
     pages = {533--534},
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     volume = {18},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_3_a19/}
}
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A. G. Kuz'min. On the behavior of characteristics of equations of mixed type with a closed line of degeneracy. Differencialʹnye uravneniâ, Tome 18 (1982) no. 3, pp. 533-534. http://geodesic.mathdoc.fr/item/DE_1982_18_3_a19/