N. A. Ismail, M. Abdul Wahid, A. Sa’at, A. Shitu, and M. B. . Abdulrahman, “Effect of Recirculation Ratio on the Combustion Characteristics of an Asymmetric Swirling Flameless Combustor using Biogas”, J. Adv. Res. Fluid Mech. Therm. Sc., vol. 108, no. 1, pp. 52–65, Sep. 2023.