• Binz (1986), S.500
• Flora Gallica (2014), S.70
• Flora Helvetica (2012), Nr.2372
• Flora Iberica (2007), S.13
• Flora Italiana (13.5.2022)
• Hess (1976ff), Bd. 1, S.214
• info flora (13.5.2022)
• Markgraf (1981), S. 106-163
• Oberdorfer (2001), Nr.154
• Pignatti (1982), Vol.3, Nr.4494
• Rothmaler (2002), S.138
• Talavera (2008)
• Tela Botanica (13.5.2022)

Foto:  Christian Fischer, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=16114341