@article {676,
	title = {Marine Flowering Plants},
	journal = {Torreya},
	volume = {40},
	year = {1940},
	pages = {120-124},
	url = {http://www.jstor.org/stable/40597321},
	author = {Moldenke, H.N.}
}
@book {578,
	title = {Das Pflanzenreich. Regni vegetabilis conspectus. IV. II. Potamogetonaceae},
	year = {1907},
	pages = {184},
	publisher = {Verlag von Wilhelm Engelmann},
	organization = {Verlag von Wilhelm Engelmann},
	edition = {Engler, A.},
	address = {Leipzig},
	author = {Ascherson, P. and Graebner, P.}
}
