@article{DE_1975_11_6_a7,
     author = {G. S. Yudaev},
     title = {On the question of stability with respect to part of the variables},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1023--1029},
     publisher = {mathdoc},
     volume = {11},
     number = {6},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_6_a7/}
}