@article{JLT_1998_8_1_a7,
     author = {A. Schmucker and G. Czichowski},
     title = {Symmetric {Algebras} and {Normal} {Forms} of {Third} {Order} {Ordinary} {Differential} {Equations}},
     journal = {Journal of Lie theory},
     pages = {129--138},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1998},
     url = {http://geodesic.mathdoc.fr/item/JLT_1998_8_1_a7/}
}