Uniqueness implies existence of solutions for nonlinear ( k ; j ) point boundary value problems for nth order differential equations. Ehme, Jeffrey — 2009 Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Existence and local uniqueness for nonlinear Lidstone boundary value problems. Ehme, Jeffrey; Henderson, Johnny — 2000 JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]