M. Miranda Jr, D. Pallara, F. Paronetto, M. Preunkert: On a characterisation of perimeters in $\Bbb R^N$ via heat semigroup Ricerche Mat. Vol. 54, N. 2, p. 615-621, 2006 M. Miranda Jr, D. Pallara, F. Paronetto, M. Preunkert: Heat semigroup and functions of bounded variation on Riemannian manifolds J. Reine Angew. Math. Vol. 613, 2007 M. Miranda Jr, D. Pallara, F. Paronetto, M. Preunkert: Short-time Heat Flow and Functions of Bounded Variation in $R^N$ Ann. Fac. Sci. Toulouse Math. Vol. (6) 16, N. 1, p. 125-145, 2007