1. The moment map in symplectic geometry;Atiyah,1984
2. M. J. Gotay, J.A. Isenberg, J.E. Marsden, R. Montgomery, J. Sniatycki and P.B. Yasskin, Momentum maps and the Hamiltonian structure of classical field theories with constraints, to appear.
3. Cohomology of quotients in symplectic and algebraic geometry;Kirwan,1984
4. A universal phase space for particles in Yang-Mills fields;Weinstein;Lett. Math. Phys.,1978
5. Symmetry and solution set singularities in Hamiltonian field theories;Arms;Acta. Phys. Polon.,1986