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Additive and Multiplicative Quantum Numbers, J. Ind. Math. Soc. 24, 557-561 (1960).
Relativistic Invariance and Hamiltonian Theories of Interacting Particles; with D. G. Currie and T. F. Jordan, Rev. Mod. Phys. 35, 350-375 (1963).
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The Harmonies in the Motion of Celestial Bodies Under Newtonian Attraction, Lectures on Theoretical Physics; with N. Mukunda, Proc. of Summer School, Boulder, Colorado (1965).
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Constraint Dynamics of Particle World Lines, with N. Mukunda and J. Goldberg, Phys Rev D23, 2218 (1981).
Form of Relativistic Dynamics with Worldliness; with N. Mukunda, Phys. Rev. D 23, 2210 (1981)
Nonabelian Monopoles Break Color I: Classical Mechanics; with A. P. Balachandran, G. Marmo, N. Mukunda, J. Nilsson and F. Zaccaria, Phys. Rev. D 29, 2919 (1984).
Unfolding, Fibre Bundles, Color Breaking and Gauge Invariance, Physics Reports 137, 93-108 (1986).
The Theory of Screws: A New Geometric Representation for the Group SU(1,1); with R. Simon and N. Mukunda, J. Math Phys. 30, 1000 (1989).
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