Suliman, A.E, G.E.M. Nasr, M.A. Baiomy, and H.M. Ahmed. “Design Prototype of Bio-Filter to Treatment of Carbon Dioxide Gas Exhausts”. Global Journal of Science Frontier Research 22, no. 4 (January 1, 1970): 1–7. Accessed September 25, 2022. https://journalofscience.org/index.php/GJSFR/article/view/101978.