@article{DE_2006_42_3_a15,
     author = {Yu. F. Orlov},
     title = {Identification from frequency parameters},
     journal = {Differencialʹnye uravneni\^a},
     pages = {425--428},
     publisher = {mathdoc},
     volume = {42},
     number = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_3_a15/}
}