López, Ernesto, Javier Cumpián, Enrique N. Becerra, Bernardo Villar, Francisco J. Ugalde, and Jorge A. Acosta. 2006. “Adaptation and Yield of Negro Medellín Bean in the Southeast of Mexico”. Agronomía Mesoamericana 11 (2):47-52. https://doi.org/10.15517/am.v11i2.17307.