@article {pmid2311051,
	title = {Sample sizes for needles in a haystack: the case of HIV seroprevalence surveys},
	journal = {Can J Public Health},
	volume = {81},
	number = {1},
	year = {1990},
	pages = {50{\textendash}52},
	author = {Frank, J. W. and Coates, R. A. and Brant, R. and Garbutt, J. M.}
}
