Mean value theorems for solutions of linear partial differential equations
1992 ◽
Vol 44
(11)
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pp. 1359-1365
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2009 ◽
Vol 160
(1)
◽
pp. 45-52
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1958 ◽
Vol 11
(1)
◽
pp. 145-151
◽
1961 ◽
Vol 14
(3)
◽
pp. 171-186
◽