Celebratio Mathematica

Y. Cho­quet-Bruhat and J. E. Marsden: “Sur la pos­it­iv­ité de la masse,” C. R. Acad. Sci. Par­is Sér. A-B 282 : 11 (1976), pp. Aii, A609–​A612. MR 397785 Zbl 0326.​35055 article

Y. Cho­quet-Bruhat and J. E. Marsden: “Solu­tion of the loc­al mass prob­lem in gen­er­al re­lativ­ity,” Comm. Math. Phys. 51 : 3 (1976), pp. 283–​296. MR 478215 Zbl 0364.​58013 article