Crespo, G., and L. Otero. “Effect of the Plantation of Pennisetum Purpureum Cv. Cuba CT-115 on the Variation of the Physico-Chemical Properties of the Soils in the Picadura Farm, Cuba”. Cuban Journal of Agricultural Science, vol. 45, no. 4, Dec. 2011, https://cjascience.com/index.php/CJAS/article/view/104.