@inbook {2993,
	title = {Effect of Vorticella convallaria and pH on the removal of Salmonella in an activated-sludge plant.},
	booktitle = {Biological approach to sewage treatment process: current status and perspectives.},
	year = {1991},
	note = { Records, Ecol., Role},
	pages = {89-92},
	publisher = {Centro Luigi Bazzuchi},
	organization = {Centro Luigi Bazzuchi},
	address = {Perugia, Italy},
	author = {Cingolani, L and Cossignani, M. and Rosini, M},
	editor = {Madoni, P.}
}
