Parhizgari, A.M., and Abe Aburachis. “Productivity and Stock Returns: 1951 - 2002”. International Journal of Banking and Finance 1, no. 2 (August 19, 2003): 69–87. Accessed May 2, 2024. https://e-journal.uum.edu.my/index.php/ijbf/article/view/8335.