K. S. Chia and  H. Abdul Rahim and  R. Abdul Rahim,  Principal Component Regression in Noninvasive Pineapple Soluble Solids Content Assessment Based On Shortwave Near Infrared Spectrum.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2013, vol. 77(5). 533 - 536
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/13682.