BioStor
 | Birds of Tikal, Guatemala, by Frank B. Smithe and Raymond A. Paynter, Jr F B Smithe and R A Paynter (1953) Bulletin of The Museum of Comparative Zoology 128: 245-324 |
 | Studies in Neotropical Paleobotany. II. The Miocene Communities of Veracruz, Mexico Alan Graham (1976) Annals of the Missouri Botanical Garden 63: 787-842 |
 | Haematoxylum sousanum (Leguminosae, Caesalpinioideae), una especie nueva del sur de México Cruz (2008) Novon 18: 25-28 |