@article{PORMA_1967__26_1_115006,
     author = {Guenther, R.B.},
     title = {A lower bound for fundamental solutions for parabolic equations},
     journal = {Portugaliae mathematica},
     pages = {93--100},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1967},
     mrnumber = {0249830},
     zbl = {0169.43602},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_1_115006/}
}