Ayoub, M., Inayat, A., Rashid, U., Ullah, S., & Lal, B. (2015). Synthesis of Stable Lithium Modified Mesoporous Catalyst for Oligomerization of Biodisel-Drive Glycerol to Diglycerol. Chemical Engineering Transactions, 45, 1291-1296. https://doi.org/10.3303/CET1545216