An expansion theorem for eigenvalue problems with several turning points
2001 ◽
Vol 229
(1)
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pp. 51-71
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1983 ◽
Vol 6
(2)
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pp. 149-181
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1996 ◽
Vol 199
(3)
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pp. 699-727
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1988 ◽
Vol 134
(2)
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pp. 379-395
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