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On the oscillation of certain functional differential equations via comparison methods
(Elsevier BV, 2003-10-01)
Some nonoscillation criteria for inclusions
(Cambridge University Press (CUP), 2006-02-01)
New nonoscillatory criteria are presented for second order differential inclusions. The theory relies on Ky Fan's fixed point theorem for upper semicontinuous multifunctions.
A selection of oscillation criteria for second-order differential inclusions
(Elsevier BV, 2009-02-01)