@article{SM_1992_72_1_a2,
     author = {A. A. Grigor'yan},
     title = {The heat equation on noncompact {Riemannian} manifolds},
     journal = {Sbornik. Mathematics},
     pages = {47--77},
     publisher = {mathdoc},
     volume = {72},
     number = {1},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_72_1_a2/}
}