C. Dalla Vecchia, A. Mattioli, D. Bolzonella, E. Palma, C. Cruz Viggi, and F. Aulenta, “Impact of Magnetite Nanoparticles Supplementation on the Anaerobic Digestion of Food Wastes: Batch and Continuous- Flow Investigations”, Chemical Engineering Transactions, vol. 49, pp. 1-6, May 2016.