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@article{CMH_1981__56_139873, author = {Shiu-Yuen Cheng and Peter Li}, title = {Heat kernel estimates and lower bound of eigenvalues.}, journal = {Commentarii mathematici Helvetici}, pages = {327--338}, publisher = {mathdoc}, volume = {56}, year = {1981}, zbl = {0484.53034}, url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_139873/} }
Shiu-Yuen Cheng; Peter Li. Heat kernel estimates and lower bound of eigenvalues.. Commentarii mathematici Helvetici, Tome 56 (1981), pp. 327-338. http://geodesic.mathdoc.fr/item/CMH_1981__56_139873/