Finiteness of lower spectra of a class of higher order elliptic operators.
W. Allegretto
Source: Pacific J. Math. Volume 83, Number 2
(1979), 303-309.
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Permanent link to this document: http://projecteuclid.org/euclid.pjm/1102784507
Zentralblatt MATH identifier: 0393.35053
Mathematical Reviews number (MathSciNet): MR557930
References
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Pacific Journal of Mathematics