WASET
    Chunchom Pongchavalit,  A Multivariate Moving Average Control Chart for Photovoltaic Processes.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2009, vol. 32(8). 563 - 566
    [viewed 04 May 2024]. Available from: https://publications.waset.org/pdf/9225.