Padron, Learsy, et al. “Isolation of Nitrogen-Fixing and Phosporus-Solubilizing Strains in Alfisol Soils of Venezuela”. Revista Mexicana De Ciencias Agrícolas, vol. 3, no. 2, July 2018, pp. 285-97, https://doi.org/10.29312/remexca.v3i2.1463.