TY - JOUR AU - Polášek, Vladimír AU - Rachůnková, Irena TI - Singular periodic problem for nonlinear ordinary differential equations with $\phi$-Laplacian JO - Electronic Journal of Differential Equations PY - 2006 VL - 2006 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a79/ LA - en ID - EJDE_2006__2006__a79 ER -