@article{2516,
author = {Guenther, R.B.},
title = {A lower bound for fundamental solutions for parabolic equations},
journal = {Portugaliae mathematica},
volume = {26},
year = {1967},
pages = {93-100},
zbl = {0169.43602},
mrnumber = {0249830},
language = {en},
url = {http://dml.mathdoc.fr/item/2516}
}
Guenther, R.B. A lower bound for fundamental solutions for parabolic equations. Portugaliae mathematica, Tome 26 (1967) pp. 93-100. http://gdmltest.u-ga.fr/item/2516/