Croat (Matuda) 1997 - Croat TB (1997) A Revision of Philodendron Subgenus Philodendron (Araceae) for Mexico and Central America. Annals of the Missouri Botanical Garden 84(3): 311. doi: 10.2307/2992022.
There is no corrections for Philodendron radiatum var. pseudoradiatum yet.