Virtual Bound Levels in a Gap of the Essential Spectrum of the Weakly Perturbed Periodic Schrödinger Operator
2016 ◽
Vol 85
(3)
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pp. 307-345
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1998 ◽
Vol 116
(1)
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pp. 846-855
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2004 ◽
Vol 249
(3)
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pp. 497-510
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Keyword(s):
1967 ◽
Vol 3
(3)
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pp. 271-287
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Keyword(s):
2013 ◽
Vol 24
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pp. 939-948