@article{DE_1989_25_9_a9,
     author = {N. S. Fal'ko},
     title = {Uniformly structurally stable sequences of {Hill} equations with periodic coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1532--1540},
     publisher = {mathdoc},
     volume = {25},
     number = {9},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_9_a9/}
}