Calvillo-Canadell, L.; Cevallos-Ferriz, S.R.S.; Rico-Arce, L. (2010). "Miocene Hymenaea flowers preserved in amber from Simojovel de Allende, Chiapas, Mexico". Review of Palaeobotany and Palynology. 160 (3–4): 126–134. Bibcode:2010RPaPa.160..126C. doi:10.1016/j.revpalbo.2010.02.007.
harvard.edu
ui.adsabs.harvard.edu
Calvillo-Canadell, L.; Cevallos-Ferriz, S.R.S.; Rico-Arce, L. (2010). "Miocene Hymenaea flowers preserved in amber from Simojovel de Allende, Chiapas, Mexico". Review of Palaeobotany and Palynology. 160 (3–4): 126–134. Bibcode:2010RPaPa.160..126C. doi:10.1016/j.revpalbo.2010.02.007.