@article {37872,
	title = {Contact sampling for the detection of interspecific association : a comparison of two vegetation types},
	volume = {79},
	year = {1991},
	pages = {781-792},
	publisher = {Journal of Ecology},
	url = {http://ams.allenpress.com/perlserv/?request=get-document\&doi=10.1175\%2F1520-0442(2001)014\%3C1923:SATCOH\%3E2.0.CO\%3B2},
	author = {Dale, M. R. T. and John, E. A. and Blundon, D. J.}
}
