1. P. A. M. Dirac, Rev. Modern Phys., 21, 392–399 (1949).
2. Library of Theoretical Physics;P. A. M. Dirac,1990
3. K. Sundermeyer, Constrained Dynamics: With Applications to Yang-Mills Theory, General Relativity, Classical Spin, Dual String Model, Springer, Berlin (1982).
4. G. Baseian, S. Matinyan, and G. Savvidy, Sov. Phys. JETP, 29, 587 (1979).
5. M. Lüscher, Nucl. Phys. B, 219, 233–261 (1983).