Stevens, P. F. 2001: Angiosperm Phylogeny Website. Version 13 [actualizada continuamente, consultada VII-2014] – http://www.mobot.org/MOBOT/research/APweb/

Title	Angiosperm Phylogeny Website. Version 13 [actualizada continuamente, consultada VII-2014]
Authorship	Stevens, P. F.
Date published	2001
Uri	http://www.mobot.org/MOBOT/research/APweb/