Particulate organic carbon export fluxes and size-fractionated POC/234Th ratios in the Ligurian, Tyrrhenian and Aegean Seas, Speicher, E.A., Moran S.B., Burd A.B., Delfanti Roberta, Kaberi H., Kelly R.P., Papucci C., Smith J.N., Stavrakakis S., Torricelli L., et al. , Deep-Sea Research Part I: Oceanographic Research Papers, Volume 53, Number 11, p.1810-1830, (2006)