J. Izquierdo, P. Outon, M. Galan, L. Jutglar, M. Villarrubia, M. Hermo, X. Ariza, I. Fernandez, Ethers of Glycerol and Isoamylenes as Biodiesel Additives: Synthesis and Characterization, Chemical Engineering Transactions. 32 (2013) 877-882. doi:10.3303/CET1332147.