On the principal eigenvalue of a second order linear elliptic problem
1985 ◽
Vol 89
(2)
◽
pp. 169-175
◽
Keyword(s):
1978 ◽
Vol 31
(4)
◽
pp. 509-519
◽
2008 ◽
Vol 340
(1)
◽
pp. 433-450
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Keyword(s):
1973 ◽
Vol 6
(4)
◽
pp. 603-606
1983 ◽
Vol 8
(6)
◽
pp. 643-665
◽
1986 ◽
Vol 17
(2)
◽
pp. 422-450
◽