@article{DE_1991_27_8_a8,
     author = {V. S. Medvedev and E. L. Fedorov},
     title = {On the structure of the bifurcation set of bifurcating separatrices},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1357--1363},
     publisher = {mathdoc},
     volume = {27},
     number = {8},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_8_a8/}
}