R. Vitanza, T. Diociaiuti, M. De Arana-Sarabia, I. Colussi, A. Cortesi, and V. Gallo, “Preliminary Evaluation of Sludge Minimization by a Lab-Scale OSA (Oxic - Settling - Anaerobic) System”, Chemical Engineering Transactions, vol. 49, pp. 469-474, May 2016.