TY - JOUR AU - Anderson, Douglas R. TI - Oscillation and nonoscillation criteria for two-dimensional time-scale systems of first-order nonlinear dynamic equations JO - Electronic Journal of Differential Equations PY - 2009 VL - 2009 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a9/ LA - en ID - EJDE_2009__2009__a9 ER -