Espinosa Pedraja, R., J. Castellanos Estupiñán, and J. U. Espinosa Martínez. “Thermal Energy and Enviroment”. Centro Azúcar Journal, vol. 35, no. 3, Sept. 2008, http://centroazucar.uclv.edu.cu/index.php/centro_azucar/article/view/519.