BERTONI, R., R. PISCIA, and C. CALLIERI. “Horizontal Heterogeneity of Seston, Organic Carbon and Picoplankton in the Photic Zone of Lago Maggiore, Northern Italy”. Journal of Limnology, vol. 63, no. 2, Aug. 2004, pp. 244-9, doi:10.4081/jlimnol.2004.244.