@book {1621,
	title = {Catalogue des plantes vasculaires du Burkina Faso},
	volume = {40},
	year = {1991},
	publisher = {Editions Quae},
	organization = {Editions Quae},
	isbn = {2859851739},
	author = {Lebrun, Jean-Pierre}
}
@article {1607,
	title = {Flowering plants of Easter Island},
	journal = {Palmarum hortus francofurtensis; 3Palmarum hortus francofurtensis; 3},
	year = {1991},
	author = {Zizka, Georg}
}
@article {860,
	title = {Flore de Mauritanie 2: 360-550},
	journal = {Centre Regional de Documentation Pedagogique, NiceCentre Regional de Documentation Pedagogique, Nice},
	year = {1991},
	author = {Barry, JP and Celles, JS}
}
