%0 Journal Article %A Khanh, Nguyen Ngoc %T Gradient estimates of Li Yau type for a general heat equation on Riemannian manifolds %J Archivum mathematicum %D 2016 %P 207-219 %V 52 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5817/AM2016-4-207/ %R 10.5817/AM2016-4-207 %G en %F 10_5817_AM2016_4_207