Asymptotic Formulas for Eigenvalues of Elliptic Operators of Second Order in unbounded Domains of the Maz'ja Class
1990 ◽
Vol 145
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pp. 281-295
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2002 ◽
Vol 334
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pp. 359-363
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2005 ◽
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pp. 91-124
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1998 ◽
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2014 ◽
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pp. 863-907
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