@article{JOLT_2005_15_1_a12,
     author = {S. Jim\'enez and J. Mu\~noz and J. Rodr{\'\i}guez},
     title = {Correspondences between {Jet} {Spaces} and {PDE} {Systems}},
     journal = {Journal of Lie Theory},
     pages = {197--218},
     year = {2005},
     volume = {15},
     number = {1},
     zbl = {1126.58002},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2005_15_1_a12/}
}