Tulmann Neto, A., Koo, F. K. S. and Cuevas-Ruíz, J. (1978) “Influence of Plant Competition and Pod Position on Seed Yield Components and Protein Content in Beans”, The Journal of Agriculture of the University of Puerto Rico, 62(2), pp. 186–190. doi: 10.46429/jaupr.v62i2.10380.