Priyanka Guin and  Dibyendu Chatterjee and  Arijit Roy,  Development of Highly Sensitive System for Measurement and Monitoring of Small Impacts.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2017, vol. 126(6). 760 - 766
    [viewed 08 December 2019]. Available from: https://publications.waset.org/pdf/10007852.