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- [7] Positive solutions of nonlocal boundary value problems involving integral conditions Nonlinear Differential Equations and Applications NoDEA, 2008, 15 : 45 - 67
- [8] Positive solutions of nonlocal boundary value problems involving integral conditions NODEA-NONLINEAR DIFFERENTIAL EQUATIONS AND APPLICATIONS, 2008, 15 (1-2): : 45 - 67