@article {31197,
	title = {A nomarski interference study of megasporogenesis and megagametogenesis in Smelowskia calycina (Cruciferae)},
	volume = {65},
	year = {1978},
	pages = {353-358},
	publisher = {American Journal of Botany},
	url = {http://www.jstor.org/stable/2442277},
	author = {Greene, Craig W.}
}
