Existence of three nontrivial solutions for semilinear elliptic equations on ℝ N
2016 ◽
Vol 11
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pp. 723-735
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1992 ◽
Vol 116
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pp. 513-513
2000 ◽
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pp. 289-299
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pp. 468-468
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1971 ◽
Vol 5
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pp. 445-457