Kaufmann Eric R.; Yao Kouadio David: Existence of solutions for a nonlinear fractional order differential equation. (2009)
Kaufmann Eric R.: A third order nonlocal boundary value problem at resonance. (2009)
Kaufmann Eric R.; Mboumi Ebene: Positive solutions of a boundary value problem for a nonlinear fractional differential equation. (2008)
Karna Basant K.; Kaufmann Eric R.; Nobles Jason: Comparison of eigenvalues for a fourth-order four-point boundary value problem. (2005)