TY - JOUR AU - Heidarkhani, Shapour TI - Non-trivial solutions for two-point boundary-value problems of fourth-order Sturm-Liouville type equations JO - Electronic Journal of Differential Equations PY - 2012 VL - 2012 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a12/ LA - en ID - EJDE_2012__2012__a12 ER -