López, E., O. H. Tosquy-Valle, B. Villar, E. N. Becerra, and F. J. Ugalde. “ Multiple Disease Resistance and Acid Soils Tolerance of Bean Genotypes”. Agronomía Mesoamericana, vol. 14, no. 2, Sept. 2003, pp. 151-5, doi:10.15517/am.v14i2.11943.