@article{05019315, title = {Characterization of several classes of second-order ODEs by using differential invariants.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2005}, year = {2005}, pages = {3661-3683}, doi = {10.1155/IJMMS.2005.3661}, zbl = {1100.34029}, language = {en}, url = {http://dml.mathdoc.fr/item/05019315} }
Martín del Rey, A.; Muñoz Masqué, J. Characterization of several classes of second-order ODEs by using differential invariants.. International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005) pp. 3661-3683. doi : 10.1155/IJMMS.2005.3661. http://gdmltest.u-ga.fr/item/05019315/