1. R. Arnowitt, S. Deser, C. Misner, The Dynamics of General Relativity. In Gravitation, edited by L. Witten (Wiley, 1962), pp. 227-265.
2. P.G. Bergmann, J.H.M. Brunnings, Non-Linear Field Theories II. Canonical Equations and Quantization. Reviews of Modern Physics 21: 480-487 (1949).
3. P.G. Bergmann, Quantization of the Gravitational Field, 1930–1988. In Studies in the History of General Relativity, edited by J. Eisenstaedt and A.J. Kox (Birkhaüser, 1992), pp. 364-366.
4. G. Bhamathi, E.C.G. Sudarshan, Time as a dynamical variable. Physics Letters A 317: 359-364 (2003).
5. H. Bondi, Science, Churchill and Me (Pergamon, 1990).