%0 Journal Article %A Zhang, Jing %A Ma, Bingqing %T Gradient estimates for a nonlinear equation $\Delta_fu+cu^{-\alpha}=0$ on complete noncompact manifolds %J Communications in Mathematics %D 2011 %P 73-84 %V 19 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/COMIM_2011__19_1_a4/ %G en %F COMIM_2011__19_1_a4