Robert M. Wald University of Chicago Papers Quantum Instability of the Cauchy Horizon in Reissner-Nordström-deSitter Spacetime Stefan Hollands, Robert M. Wald, Jochen Zahn December 12, 2019 open access link Class. Quantum Grav. 37(11), 115009 (2020) Existence of Local Covariant Time Ordered Products of Quantum Fields in Curved Spacetime Stefan Hollands, Robert M. Wald November 30, 2001 open access link Commun.Math.Phys. 231 (2002) 309-345 Local Wick Polynomials and Time Ordered Products of Quantum Fields in Curved Spacetime Stefan Hollands, Robert M. Wald March 20, 2001 open access link Commun.Math.Phys.223:289-326,2001