@article{RRACEFN_1983_1983_1_a0,
     author = {Maravall Casesnoves, Dar{\'\i}o},
     title = {Principios variacionales y ecuaciones diferenciales de la din\'amica relativista de los sistemas.},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales },
     pages = {19-47},
     publisher = {mathdoc},
     volume = {77},
     number = {1},
     year = {1983},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RRACEFN_1983_1983_1_a0/}
}