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Murray H. Protter.
Basic elements of real analysis.
Undergraduate Texts in Mathematics. Springer-Verlag, New York, 1998.
[2]
Murray H. Protter.
Upper bounds for eigenvalues of elliptic operators.
In Partial differential equations and applications, volume 177
of Lecture Notes in Pure and Appl. Math., pages 271-277. Dekker, New
York, 1996.
[3]
Murray H. Protter and Charles B. Morrey, Jr.
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Undergraduate Texts in Mathematics. Springer-Verlag, New York, second
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[4]
M. H. Protter.
The asymptotics of eigenvalues.
In Maximum principles and eigenvalue problems in partial
differential equations (Knoxville, TN, 1987), volume 175 of Pitman Res.
Notes Math. Ser., pages 178-188. Longman Sci. Tech., Harlow, 1988.
[5]
M. H. Protter.
Universal inequalities for eigenvalues.
In Maximum principles and eigenvalue problems in partial
differential equations (Knoxville, TN, 1987), volume 175 of Pitman Res.
Notes Math. Ser., pages 111-120. Longman Sci. Tech., Harlow, 1988.
