Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1976_12_5_a2, author = {L. B. Zelenko}, title = {The spectrum of a {Schr\"odinger} equation with a complex pseudoperiodic {potential.~I}}, journal = {Differencialʹnye uravneni\^a}, pages = {806--814}, publisher = {mathdoc}, volume = {12}, number = {5}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_5_a2/} }
L. B. Zelenko. The spectrum of a Schr\"odinger equation with a complex pseudoperiodic potential.~I. Differencialʹnye uravneniâ, Tome 12 (1976) no. 5, pp. 806-814. http://geodesic.mathdoc.fr/item/DE_1976_12_5_a2/