Ruggiero, C., and G. Angelino. “Changes of Root Hydraulic Conductivity and Root/Shoot Ratio of Durum Wheat and Barley in Relation to Nitrogen Availability and Mercury Exposure”. Italian Journal of Agronomy, vol. 2, no. 3, Sept. 2007, pp. 281-90, doi:10.4081/ija.2007.281.