

@article {4126,
	title = {{Occurrence of Cryptosporidium oocysts and Giardia Cysts in sewage in Norway}},
	journal = {Applied and Environmental Microbiology},
	volume = {72},
	year = {2006},
	pages = {5297{\textendash}5303},
	author = {Robertson, LJ and Hermansen, L and Gjerde, B}
}
