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2. Constraints in Covariant Field Theories
3. Dirac Bracket Transformations in Phase Space
4. For a complete review of the research program aiming to give a unified description of the four interactions in terms of the Dirac–Bergmann observables in the framework of the rest-frame instant form of dynamics, which is the classical background of the Tomonaga–Schwinger formulation of quantum field theory see L. Lusanna, Towards a Unified Description of the Four Interactions in Terms of Dirac–Bergmann Observables, invited contribution to the book of the Indian National Science Academy for the International Mathematics Year, 2000, AD, HEP-TH/9907081.
5. The Theory of Fields,1995