Ehlers, Jürgen Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
Ehlers, J. (1970). Relativistic Kinetic Theory of Charged Gases. In La Magneothydrodynamique Classique et Relativiste (pp. 221-229). Paris: Editions du Centre National de la Recherche Scientifique.