H.Y. Lim, B.H.H. Goh, P.V. Chai, C.K. Ang, C.T. Chong, Assessing the Energy Profitability of Biofuels Generated from Coffee Waste via Microwave Pyrolysis, Chemical Engineering Transactions. 112 (2024) 271-276. doi:10.3303/CET24112046.