Rodríguez, A. T. “Chemical Characterization of the Ground Grain and the Fat-Free Soybean (Glycine Max, Merr; Var. INCA SOY 24) Cake Used in the Culture Medium for Bradyrhizobium Elkanii”. Cultivos Tropicales, vol. 25, no. 2, Mar. 2013, pp. 87-90, https://ediciones.inca.edu.cu/index.php/ediciones/article/view/512.