Global solutions of the Cauchy problem for quasi linear first order equations in several space variables, (with E. Conway), Comm. Pure Appl. Math.,18, (1965), 665-677.

Topological Methods in the Theory of Shock Waves, (with C. Conley), Proc. Symp. Pure Math, 23, 293-302.

On the structure of magnetohydrodynamic shock waves, (with C. Conley), Comm. Pure Appl. Math.28, 367-375.

Positively invariant regions for systems of reaction-diffusion equations, (with C. Conley), Indiana Math. J., 26, (1974), 373-392.

Bifurcation and symmetry breaking, (with A. Wasserman), Inven. Math., 100, 63-95.

Existence of infinitely – many smooth , static, global solutions of the Einstein-Yang/Mills equations, (with A. Wasserman), Comm. Math. Phys, 151, 303-325.

Astrophysical shock wave solutions of the Einstein equations, (with B. Temple), Phys. Rev. D, 51, 2733-2743.

The interaction of Dirac particles with non-abelian guage fields and gravitation: bound states, (with F. Finster, and ST Yau), Nuclear Physics B, 584, 387-414.

Decay rates and probability estimates for massive Dirac particles in the Kerr-Newman black hole geometry, Comm. Math. Phys, 230, 201-244.

Shock wave cosmology inside a black hole, (with B. Temple), Proc. Nat. Acad. Sci, 100, 11216-11218.

Nonlinear dynamical stability of Newtonian rotating White Dwarf and rotating supermassive stars, (with T. Luo), Comm. Math. Phys., 284, 425-457.

A rigorous treatment of energy extraction from a rotating Kerr black hole, (with F. Finster, N. Kamran, and ST Yau), Comm. Math. Phys, 287, 829-847.

Linear waves in the Kerr geometry: a mathematical voyage to black hole physics, (with F. Finster, N. Kamran, and ST Yau), Bull. AMS,46, 635-660.

A one parameter Family of expanding wave solutions of the Einstein equations that induces an anomalous acceleration into the standard model of cosmology, (with B. Temple), Proc. Nat. Acad. Sci, USA, 16, 14213-14218.