@article{JEDP_1994____A14_0,
author = {Birman, Mikhail Sh.},
title = {Discrete spectrum of the periodic elliptic operator with a differential perturbation},
journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
year = {1994},
pages = {1-4},
mrnumber = {1298685},
language = {en},
url = {http://dml.mathdoc.fr/item/JEDP_1994____A14_0}
}
Birman, Mikhail Sh. Discrete spectrum of the periodic elliptic operator with a differential perturbation. Journées équations aux dérivées partielles, (1994), pp. 1-4. http://gdmltest.u-ga.fr/item/JEDP_1994____A14_0/
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