Dain, Sergio Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
0411081.pdf (Preprint), 255KB
Dain, S. (2006). Elliptic systems. In J. Frauendiener, D. J. Giulini, & V. Perlick (Eds.), Analytical and Numerical Approaches to Mathematical Relativity (pp. 117-140). Berlin u.a: Springer.