حسونانتصار. “Method to Estimate the Correlation Coefficients in the Distribution of the True Multivariate ”. Al Kut Journal of Economic and Administrative Sciences 1, no. 1 (August 12, 2009): 89-106. Accessed November 24, 2019. https://kjeas.uowasit.edu.iq/index.php/kjeas/article/view/6.