Delgado-Salinas, A., Martínez-Hernández, E. and Fernández-Ortuño, P. (1982) “A study of the polen of Phaseolus chiapasanus Piper (Leguminosae, Phaseolinae)”, Botanical Sciences, 0(43), pp. 25 - 34. doi: 10.17129/botsci.1265.