@article {565,
	title = {Phosphorus and nitrogen limitation of phytoplankton growth in the freshwaters of North America: a review and critique of experimental enrichments},
	journal = {Canadian Journal of Fisheries and Aquatic Sciences },
	volume = {47},
	year = {1990},
	pages = {1468-1477},
	author = {Elser, J.J. and Marzolf, E.R. and Goldman, C.R.}
}
