Crespo, Gustavo, Tom?s E. Ruiz, y Julio ?lvarez. 2011. «Effect of Green Manure from Tithonia (T. Diversifolia) on the Establishment and Production of Forage of P. Purpureum Cv. Cuba CT-169 and on Some Soil Properties». Cuban Journal of Agricultural Science 45 (1). https://cjascience.com/index.php/CJAS/article/view/191.