Yukiyo Yamamoto and  Jun Furuya and  Shintaro Kobayashi,  Spatial Correlation Analysis between Climate Factors and Plant Production in Asia.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2009, vol. 33(9). 424 - 428
    [viewed 30 May 2020]. Available from: https://publications.waset.org/pdf/3155.