Rohana Musa and  Yuzman Yusoff and  Chia Chieu Yin and  Hanif Che Lah,  Design and Characterization of a CMOS Process Sensor Utilizing Vth Extractor Circuit.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2020, vol. 167(11). 371 - 375
    [viewed 23 October 2021]. Available from: https://publications.waset.org/pdf/10011611.