Ordoñez Sánchez, Y.C., Rodríguez Acosta, C. and Rodríguez Suárez, L. 2017. Determination of optimal conditions for obtaining phosphate fertilizer from cuban phosphoric rock. Ingeniería y Competitividad. 19, 2 (Jul. 2017), 131–142. DOI:https://doi.org/10.25100/iyc.v19i2.5300.