%0 Journal Article %A Guenther, R.B. %T A lower bound for fundamental solutions for parabolic equations %J Portugaliae mathematica %D 1967 %P 93-100 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1967__26_1_115006/ %G en %F PORMA_1967__26_1_115006