@article {275,
	title = {The Origins of Heterospory: a Comparative Study of Sexual Behaviour in the Fern Platyzoma Microphyllum and the Horsetail Equisetum Giganteum L},
	journal = {Journal of the Linnean Society},
	volume = {88},
	year = {1984},
	pages = {11-34},
	author = {Duckett, J and Pang, W}
}
