Taxon - Links and literature
Bańares Baudet, Á., Marrero Gómez, M. V. & Scholz, S.(2008): Taxonomic and nomenclatural notes on Crassulaceae of the Canary Islands, Spain.
Willdenowia 38(2), pages 475-489.
http://www.bgbm.org/willdenowia/w-pdf/wi... [as Crassulaceae]
Families of Flowering Plants [crassula]
Watson L. , Dallwitz M. J.: Families of Flowering Plants [http://delta-intkey.com/angio]
Hejný S., Slavík B., (Eds.) (2003): KVĚTENA ČR, díl 3, Academia, Praha, 542 str.