@article{DE_1983_19_6_a19,
     author = {A. A. Levakov},
     title = {Identifiability of nonlinear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1074--1078},
     publisher = {mathdoc},
     volume = {19},
     number = {6},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_6_a19/}
}