Barreto Torrella, S., D. Rodríguez, and H. Oquendo Ferrer. “Economic Eficiency in Biogas Plant Feeding With Cake Filter”. Centro Azúcar Journal, vol. 33, no. 1, Jan. 2006, http://centroazucar.uclv.edu.cu/index.php/centro_azucar/article/view/601.