Spectral properties and oscillation theorems for periodic boundary-value problems of Sturm-Liouville type
1972 ◽
Vol 11
(3)
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pp. 592-606
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1978 ◽
Vol 27
(2)
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pp. 190-213
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2011 ◽
Vol 12
(4)
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pp. 2378-2384
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2009 ◽
Vol 19
(1)
◽
pp. 80-104
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2016 ◽
Vol 5
(4)
◽
pp. 195-214
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2009 ◽
Vol 3
(4)
◽
pp. 501-509
◽
2007 ◽
Vol 23
(1-2)
◽
pp. 167-182
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