W.C. Chee, W.S. Ho, H. Hashim, Z. Ab Muis, A.X.Y. Mah, C.P.C. Bong, X. Ho, Design of Biomethane and Organic Waste Storages for Anaerobic Digestion, Chemical Engineering Transactions. 89 (2021) 397-402. doi:10.3303/CET2189067.