Cymbalaria im Germplasm Resources Information Network (GRIN), USDA, ARS, National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Abgerufen am 10. Mai 2014.
bgbm.org
ww2.bgbm.org
Karol Marhold: Scrophulariaceae. Cymbalaria. In: Euro+Med Plantbase – the information resource for Euro-Mediterranean plant diversity. Berlin 2011.