Existence and multiplicity of positive solutions for a system of fractional boundary value problems
2012 ◽
Vol 63
(9)
◽
pp. 1369-1381
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2012 ◽
Vol 252
(5)
◽
pp. 3403-3435
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2011 ◽
Vol 61
(11)
◽
pp. 3355-3363
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2004 ◽
Vol 3
(4)
◽
pp. 729-756
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