Sarbjot Singh Sandhu,  Improvement in Performance and Emission Characteristics of a Single Cylinder S.I. Engine Operated on Blends of CNG and Hydrogen.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2013, vol. 79(7). 1380 - 1384
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/16376.