@article{JOLT_1992_2_2_a10,
     author = {G. Czichowski and M. Thiede},
     title = { Standard {Forms} of {Differential} {Equations} and {Symmetry} {Computation}},
     journal = {Journal of Lie Theory},
     pages = {223--234},
     year = {1992},
     volume = {2},
     number = {2},
     zbl = {0780.34020},
     url = {http://geodesic.mathdoc.fr/item/JOLT_1992_2_2_a10/}
}