@book {19860,
	title = {Systema vegetabilium},
	volume = {3},
	year = {1818},
	publisher = {J. G. Cotta},
	organization = {J. G. Cotta},
	address = {Stuttgart},
	url = {http://bibdigital.rjb.csic.es/ing/Libro.php?Libro=1700},
	author = {Roemer, Johann J. and Schultes, Joseph A.}
}
