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21/06/2014, 20:20
... Value Problems for Higher Order Differential Equations, World Scientific, Teaneck, NJ, USA, 1986 R P Agarwal and F.-H Wong, “Existence of positive solutions for non-positive higher- order BVPs,” Journal ... 2004 A Cabada, “The method of lower and upper solutions for second, third, fourth, and higher order boundary value problems,” Journal of Mathematical Analysis and Applications, vol 185, no 2, pp ... R Grossinho and F M Minhos, “Upper and lower solutions for higher order boundary value ´ problems,” Nonlinear Studies, vol 12, no 2, pp 165–176, 2005 11 M R Grossinho, F M Minhos, and A I Santos,...