Shehzad Ashraf Ch. and  Aftab Ahmed Khan and  Zahid Mehmood and  Muhammad Ahsan Habib and Qasim Mehmood,  Efficient Time Synchronization in Wireless Sensor Networks.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 1313 - 1316
    [viewed 22 October 2021]. Available from: https://publications.waset.org/pdf/15817.