• Adler (1994), S.883
• Binz (1986), S.504
• Flora Gallica (2014), S.294
• Flora Helvetica (2012), Nr.2404
• Flora Italiana - Link (11.9.2022)
• Hess (1976ff), Bd.1, S.202
• info flora - Link (11.9.2022)
• Markgraf (1981), S.236f
• Oberdorfer (2001), Nr.115
• Pignatti (1982), Vol.3, Nr.4522
• Rothmaler (2002), S.143
• Tela Botanica - Link (11.9.2022)
• Wiegleb (1998), 287f
• World Flora Online - Link (11.9.2022)

Foto: Von Christian Fischer, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=15976281