@article{DAN_1978_239_6_a3,
     author = {L. B. Zelenko and P. A. Kuchment},
     title = {On the {Floquet} representation of exponentially increasing solutions of elliptic equations with periodic coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {1283--1284},
     year = {1978},
     volume = {239},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_6_a3/}
}