Kooshki, Ali, almassi, morteza, Ghahderijani, Mohammad, Shamloui, Hamidreza. “Investigating the most appropriate treatments for ultrasonic duration, temperature and water ratio to the contents of livestock rumen in biogas production (Case study: Khorramabad city slaughterhouse).” Journal of Environmental Science and Technology, vol. 23, no. 12, 2022, pp. 227-242. 10.30495/jest.2021.54005.5115