@article{Brewer1984,
	title = {Poisson, modified poisson and collocated sampling},
	author = {K. R. W. Brewer and L. J. Early and Muhammad Hanif},
	journal = {Journal of Statistical Planning and Inference},
	month = {Jul},
	number = {1},
	pages = {15--30},
	url = {http://www.sciencedirect.com/science/article/B6V0M-45F5PJ3-G/1/0d3e846c9a676233ba8d0115ba963f66},
	volume = {10},
	year = {1984},
	biburl = {http://www.bibsonomy.org/bibtex/22244a7b8f9d87515e84b2a7f112fcf5d/smicha},
	keywords = {Unequal probability sampling }
}