@proceedings {617,
	title = {Completely integrable Ermakov systems},
	journal = {I Encontro Brasileiro de F{\'\i}sica dos Plasmas},
	year = {1991},
	pages = {173},
	publisher = {Anais do I Encontro Brasileiro de F{\'\i}sica dos Plasmas, v. 2},
	address = {Santos},
	attachments = {https://professor.ufrgs.br/sites/default/files/fernando-haas/files/completely_integrable.pdf},
	author = {F. Haas and J. Goedert}
}
