Upper and lower solutions method for a class of singular fractional boundary value problems with -Laplacian operator.
Periodic oscillation of fuzzy Cohen-Grossberg neural networks with distributed delay and variable coefficients.
Existence of concave positive solutions for boundary value problem of nonlinear fractional differential equation with -Laplacian operator.
Positive solution to nonzero boundary values problem for a coupled system of nonlinear fractional differential equations.
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