Mohd Sies, M. ., and M. . Abdul Wahid. “Numerical Investigation of the Asymmetrical Vortex Combustor Running on Biogas”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, vol. 74, no. 1, Jan. 2021, pp. 1-18, https://www.akademiabaru.com/submit/index.php/arfmts/article/view/3042.