Cherry Dhiman and  Ayushi Paliwal and  Mohd. Shahid Khan and  M. N. Reddy and  Vinay Gupta and  Monika Tomar,  Detailed Sensitive Detection of Impurities in Waste Engine Oils Using Laser Induced Breakdown Spectroscopy, Rotating Disk Electrode Optical Emission Spectroscopy and Surface Plasmon Resonance.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2019, vol. 151(7). 167 - 172
    [viewed 20 November 2019]. Available from: https://publications.waset.org/pdf/10010582.