@article {1684,
	title = {Flora of Macaronesia, checklist of vasclular plants: 4},
	journal = {SommerfeltiaSommerfeltia},
	number = {17},
	year = {1993},
	pages = {1-297},
	isbn = {0802-8478},
	author = {Hansen, Alfred and Sunding, Per}
}
