@article{1103842277,
author = {Ludwig, Garry},
title = {Geometrodynamics of electromagnetic fields in the Newman-Penrose formalism},
journal = {Comm. Math. Phys.},
volume = {16},
number = {1},
year = {1970},
pages = { 98-108},
language = {en},
url = {http://dml.mathdoc.fr/item/1103842277}
}
Ludwig, Garry. Geometrodynamics of electromagnetic fields in the Newman-Penrose formalism. Comm. Math. Phys., Tome 16 (1970) no. 1, pp. 98-108. http://gdmltest.u-ga.fr/item/1103842277/