GUILIZZONI, PIERO, and MARINA MANCA. “In Memory of Delio Ruggiu (July 31st 1934 – August 8th 2004)”. Journal of Limnology 63, no. 2 (August 1, 2004): 157–160. Accessed April 20, 2024. https://www.jlimnol.it/jlimnol/article/view/jlimnol.2004.157.