A Simple New Proof of the Mean Value Theorems for Certain Elliptic Equations
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1985 ◽
Vol 122
(1)
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pp. 259-265
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1990 ◽
pp. 103-125
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2000 ◽
Vol 31
(3)
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pp. 447-449
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1935 ◽
Vol 064
(5)
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pp. 80-93
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