1. Arendt, W.: Gaussian estimates and interpolation of the spectrum in L p . Differ. Integral Equ. 7, 1153–1168 (1994)
2. Arendt, W.: Semigroups and evolution equations: functional calculus, regularity and kernel estimates. In: Evolutionary Equations, Handbook of Differential Equations, pp. 1–5 (2004)
3. Arendt, W.: Heat kernels. In: Manuscript of the 9th Internet Seminar (2006). http://www.uni-ulm.de/fileadmin/website.uni.ulm/mawi.inst.020/arendt/downloads/internetseminar.pdf
4. Arendt, W., ter Elst, A.F.M.: Gaussian estimates for second order elliptic operators with boundary conditions. J. Oper. Theory 38, 87–130 (1997)
5. Arendt, W., Metafune, G., Pallara, D.: Schrödinger operators with unbounded drift. J. Oper. Theory 55(1), 185–211 (2006)