%0 Journal Article %A Cranston, M. %T A Probabilistic Approach to Gradient Estimates %J Canadian mathematical bulletin %D 1992 %P 46-55 %V 35 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1992-007-6/ %R 10.4153/CMB-1992-007-6 %F 10_4153_CMB_1992_007_6