TY - JOUR AU - Zhang, Jing AU - Ma, Bingqing TI - Gradient estimates for a nonlinear equation $\Delta_fu+cu^{-\alpha}=0$ on complete noncompact manifolds JO - Communications in Mathematics PY - 2011 SP - 73 EP - 84 VL - 19 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/COMIM_2011__19_1_a4/ LA - en ID - COMIM_2011__19_1_a4 ER -