@article{DE_1985_21_2_a22,
     author = {V. S. Kozlova},
     title = {Singular points of first degree of non-roughness situated on the line of discontinuity of the right-hand sides of a system 
},
     journal = {Differencialʹnye uravneni\^a},
     pages = {334--335},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_2_a22/}
}