Bekele, M. S., T. Samosamo, A. A. Seyoum, and M. J. George. “Efficacy of Cellulose Degrading Microbial Strains on the Decomposition of Sewage Water Microalgae for the Production of Biogas”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 18, no. 2, Dec. 2014, pp. 258-67, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/3065.