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 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a180/ LA - en ID - EJDE_2003__2003__a180 ER -