Spectral properties of a fourth-order differential operator with integrable coefficients
2010 ◽
Vol 270
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pp. 184-193
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2015 ◽
Vol 39
(6)
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pp. 1298-1310
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2017 ◽
Vol 33
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pp. 311-326
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2018 ◽
Vol 73
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pp. 254-265
1981 ◽
Vol 90
(1-2)
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pp. 147-153
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1990 ◽
Vol 42
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pp. 101-114
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1974 ◽
Vol s2-8
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pp. 217-225
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