1. P.A.M. Dirac, Generalized hamiltonian dynamics, Can. J. Math. 2 (1950) 129.
2. P.A.M. Dirac, Lectures on quantum mechanics, Yeshiva University, U.S.A. (1964).
3. E.C.G. Sudarshan and N. Mukunda, Classical dynamics-a modern perspective, Wiely-Interscience, U.K. (1974).
4. A. Hanson, T. Regge and C. Tietelboim, Constrained hamiltonian system, Accademia Nazionale dei Lincei, Roma, Italy (1976).
5. K. Sundermeyer, Constrained dynamics, Springer, U.S.A. (1982).