TY - JOUR AU - Kaufmann, Eric R. TI - Positive solutions of a three-point boundary-value problem on a time scale JO - Electronic journal of differential equations PY - 2003 VL - 2003 UR - http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a80/ LA - en ID - EJDE_2003__2003__a80 ER -