Higher order multi-point boundary value problems with sign-changing nonlinearities and nonhomogeneous boundary conditions.
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Graef, J.R., Kong, Lingju, Kong, Qingkai, Wong, James S.W. (2010)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Pavel Calábek (1999)
Mathematica Bohemica
Sufficient conditions for the existence of solutions to boundary value problems with a Caratheodory right hand side for ordinary differential systems are established by means of continuous approximations.
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