@article{05038638, title = {Symmetry properties of autonomous integrating factors.}, journal = {SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]}, volume = {1}, year = {2005}, zbl = {1106.34022}, language = {en}, url = {http://dml.mathdoc.fr/item/05038638} }
Moyo, Sibusiso; Leach, P.G.L. Symmetry properties of autonomous integrating factors.. SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only], Tome 1 (2005) . http://gdmltest.u-ga.fr/item/05038638/