WASET
    Ararat Khachatryan and  Davit Mirzoyan,  On-Chip Aging Sensor Circuit Based on Phase Locked Loop Circuit .   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 123(3). 249 - 253
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10006573.