@article{AIHPA_1974__21_2_147_0,
     author = {Modugno, Marco},
     title = {Formulation of analytical mechanics in general relativity},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {147--174},
     publisher = {Gauthier-Villars},
     volume = {21},
     number = {2},
     year = {1974},
     mrnumber = {373543},
     zbl = {0305.70019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1974__21_2_147_0/}
}