@article{EXMATH_1996_1996_1_a23,
     author = {Gr\`acia, Xavier and Pons, Josep M.},
     title = {Transformaciones de {Noether} (y {Gauge)} para lagrangianas singulares de orden superior.},
     journal = {Extracta mathematicae},
     pages = {65-79},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1996_1996_1_a23/}
}