1. General Relativity — An Einstein Centenary Survey;Hawking,1979
2. in the proceedings of the 1984 Les Houches Summer School;Hamber,1986
3. in the proceedings of the 1989 Cargèse NATO workshop on Probabilistic Methods in Quantum Field Theory and Quantum Gravity;Hamber,1990
4. General relativity without coordinates
5. Quantum Regge calculus