Cuticle Database Project
Barclay R.S., Wilf P., Dilcher D.L. & McElwain J.C. (2012): The Cuticle Database Project, The Earth and Environmental Systems Institute of Pennsylvania State University [Version 1.1, 10th May 2012]. Published on the Internet. http://cuticledb.eesi.psu.edu/ [2019-04-10].
InsideWood
InsideWood. 2004-onwards; Published on the Internet. http://insidewood.lib.ncsu.edu/search/ [2019-04-10].
MORPHYLL
Traiser C., Roth-Nebelsick A., Lange J. & Kovar-Eder J. (2015): MORPYHLL - database for acquisition of ecophysiologically relevant morphometric data of fossil leaves. Version 1.0; State Museum of Natural History Stuttgart; http://www.morphyll.naturkundemuseum-bw.de; doi: 10.17616/R3PQ07.
Paleobotany Project
Miller I., Johnson K. & Ellis B. (2005): The Paleobotany Project. Denver Museum of Nature & Science (DMNS). Published on the Internet. http://paleobotanyproject.org [2019-04-10].
Pflanzen der Hohenheimer Gärten
Datenbank über die Pflanzen in den Hohenheimer Gärten