Doorenbos, J. The sections of Begonia : including descriptions, keys and species lists. - 266 p.: ill. - Studies in Begoniaceae 5 Wageningen agricultural university papers 98,2 . ISBN: 90-5782-007-2 Subjects--Topical Terms: Begonias--Classification.begoniaplantkunde582.846--Begoniineae. Begonias