Samir J. Deshmukh and  Lalit B. Bhuyar and  Shashank B. Thakre and  Sachin S. Ingole,  Mathematical Correlation for Brake Thermal Efficiency and NOx Emission of CI Engine using Ester of Vegetable Oils.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 27(3). 301 - 306
    [viewed 23 April 2021]. Available from: https://publications.waset.org/pdf/13789.