TY - JOUR AU - Li, Tongxing TI - Comparison theorems for second-order neutral differential equations of mixed type JO - Electronic Journal of Differential Equations PY - 2010 VL - 2010 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2010__2010__a296/ LA - en ID - EJDE_2010__2010__a296 ER -