@article {610,
	title = {On the Lie symmetries of a class of generalized Ermakov systems},
	journal = {Phys. Lett. A},
	volume = {239},
	year = {1998},
	pages = {348},
	attachments = {https://professor.ufrgs.br/sites/default/files/fernando-haas/files/lie_symmetries_class.pdf},
	author = {J. Goedert and F. Haas}
}
