Leiva-Mas, M. J., D. I. Rodríguez-Rico, and D. C. Quintana-Pérez. “CALCULATION OF THE ECOLOGICAL FOOTPRINT CENTRAL UNIVERSITY "MARTA ABREU" VILLAS”. Chemical Technology, Vol. 31, no. 1, Feb. 2016, pp. 47-52, doi:10.1590/2224-6185.2011.1.%x.