%0 Journal Article %A Wang, Feng-Yu %T Gradient Estimates on Rd %J Canadian mathematical bulletin %D 1994 %P 560-570 %V 37 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1994-083-5/ %R 10.4153/CMB-1994-083-5 %F 10_4153_CMB_1994_083_5