@article{DE_1985_21_3_a13,
     author = {V. V. Ivanov and A. \`E. Vuginshteyn},
     title = {Continual models of developing systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {473--484},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_3_a13/}
}