Sikora. Gaussian heat kernel upper bounds via the Phragm´en-Lindel¨of theorem. Proc. Lond. Math. Soc. (3), 96(2):507-544, 2008.Thierry Coulhon and Adam Sikora, Gaussian heat kernel upper bounds via the Phragm´en- Lindel¨of theorem, Proc. Lond. Math. Soc. (3) 96 (2008),...