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Adivar Murat; Raffoul Youssef N.: Existence of periodic solutions in totally nonlinear delay dynamic equations. (2009)
Raffoul Youssef N.: Positive periodic solutions in neutral nonlinear differential equations. (2007)
Kaufmann Eric B.; Raffoul Youssef N.: Eigenvalue problems for a three-pint boundary-value problem on a time scale. (2004)
Raffoul Youssef N.: Positive solutions of three-point nonlinear second order boundary value problem. (2002)
