@article {756,
	title = {Factors regulating phytoplankton production and standing crops in the world{\textquoteright}s freshwaters},
	volume = {23},
	year = {1978},
	pages = {478-486},
	author = {Schindler, D. W.}
}
@article {294,
	title = {The evolution of phosphorus limitation in lakes},
	journal = {Science},
	volume = {195},
	year = {1977},
	pages = {260-262},
	author = {Schindler, D. W.}
}
