@article{AIHPA_1967__7_4_271_0,
     author = {Lichnerowicz, Andr\'e},
     title = {Th\'eorie des rayons en hydrodynamique et magn\'etohydrodynamique relativistes},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {271--302},
     publisher = {Gauthier-Villars},
     volume = {7},
     number = {4},
     year = {1967},
     language = {fr},
     url = {http://archive.numdam.org/item/AIHPA_1967__7_4_271_0/}
}