@article {3167,
	title = {Effects of copper on ciliate communities from activated-sludge plants.},
	journal = {Acta Protozoologica},
	volume = {33},
	year = {1994},
	note = { Records},
	pages = {219-226},
	author = {Gracia, M. P. and Salvado, H. and Rius, M. and Amigo, J. M.}
}
