Hernandez Orte, P.; Guitart, A.; Ferreira, V.; Gracia, J.; Cacho, J.; Hernandez Orte, P., Department of Analytical Chemistry, Sciences Faculty, University of Zaragoza, Plaza San Francisco s/n, 50009 Zaragoza, Spain; Guitart, A., Department of Analytical Chemistry, Sciences Faculty, University of Zaragoza, Plaza San Francisco s/n, 50009 Zaragoza, Spain; Ferreira, V., Department of Analytical Chemistry, Sciences Faculty, University of Zaragoza, Plaza San Francisco s/n, 50009 Zaragoza, Spain; Gracia, J., Cellar COVINCA, Longares, Zaragoza, Spain; Cacho, J., Department of Analytical Chemistry, Sciences Faculty, University of Zaragoza, Plaza San Francisco s/n, 50009 Zaragoza, Spain (Sage Publications, 1998)