An oscillation criterion for second order sublinear differential equations
1992 ◽
Vol 171
(2)
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pp. 346-351
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2014 ◽
Vol 548-549
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pp. 1007-1010
1986 ◽
Vol 98
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pp. 109-109
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1984 ◽
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1990 ◽
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2011 ◽
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