@inbook {7,
	title = {Potamogetonaceae},
	booktitle = {Flora Reipublicae Popularis Sinicae},
	year = {1992},
	publisher = {Science Press},
	organization = {Science Press},
	address = {Beijing},
	author = {Sun, X. and Wang, H. and Li, Q. and Sun, X.}
}
@article {14,
	title = {Hydrocharitaceae, Lemnaceae, Pontenderiaceae, Potamogetonaceae, Gentianaceae(Limnanthemum), Nymphaeaceae},
	journal = {Botanisk Tidsskrift},
	volume = {24},
	year = {1902},
	note = {(not seen)},
	pages = {260-263},
	author = {Ostenfeld, C.H.}
}
