Roger L Goodwin,  Choosing between the Regression Correlation, the Rank Correlation, and the Correlation Curve.   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2015, vol. 101(5). 1699 - 1703
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10001557.