@article{JLT_2005_15_1_JLT_2005_15_1_a12,
     author = {S. Jim�nez and J. Mu�oz and J. Rodr�guez },
     title = {Correspondences between {Jet} {Spaces} and {PDE} {Systems}},
     journal = {Journal of Lie theory},
     pages = {197--218},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/JLT_2005_15_1_JLT_2005_15_1_a12/}
}