@article{AIHPA_1972__16_3_133_0,
     author = {Maugin, G\'erard A.},
     title = {An action principle in general relativistic magnetohydrodynamics},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {133--169},
     publisher = {Gauthier-Villars},
     volume = {16},
     number = {3},
     year = {1972},
     mrnumber = {302062},
     zbl = {0245.76088},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1972__16_3_133_0/}
}