1. R.Schrader, R.Seiler, D.A.Uhlenbrock, eds.,Proceedings of the 1981 IAMP Conference in Berlin, Lecture Notes in Physics, Springer, Berlin-Heidelberg-New York, to appear.
2. T.Regge, Nuovo Cimento 19,551–571 (1961).
3. J.Fröhlich, Regge calculus and discretized gravitational functional integrals, I.H.E.S. preprint, to appear.
4. Lecture Notes in Physics,1973
5. B.Simon, The P(φ)2 Euclidean (Quantum) Field Theory, Princeton University Press, Princeton, 1973.