@article{DAN_1978_242_6_a7,
     author = {A. A. Krasovskii},
     title = {Condition of observability of nonlinear processes},
     journal = {Doklady Akademii Nauk},
     pages = {1265--1268},
     year = {1978},
     volume = {242},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_6_a7/}
}