Haider, S. M., S. Hussain, H. Farid, U. Shahid, A. Ahmed, and N. Abbas. “Experimental Investigations on the Effects of HHO Gas Fuel Additive on Performance of a Gasoline Engine”. Pakistan Journal of Engineering and Technology, vol. 4, no. 4, Dec. 2021, pp. 73-78, doi:10.51846/vol4iss4pp73-78.