Environmental Engineering and Management Journal

Nuria Calvo¹, Jacobo Fe s², Ignacio P rez³, Ana R. Pasand n³

1 University of A Coru a, Faculty of Economics, campus de Elvi a, 15071 A Coru a, Spain
2 University of Santiago de Compostela, Faculty of Economics, avda. do Burgo, s/n. Campus Norte, 15782 Santiago de Compostela, Spain
3 University of A Coru a, E. T. S. I. Caminos, campus de Elvi a, 15071 A Coru a, Spain