Rajneesh Kaushal, Sonam Sandhu,. “Methane Production Optimization from Continuous Anaerobic Digestion of Fruit Pulp Waste With Cow Dung Using Response Surface Methodology”. Design Engineering (July 27, 2021): 5030-5052. Accessed May 7, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/2951.