Tobin Obari, Dibiah, and Mojekwu, Ogechukwu Rita. “TEST OF RANDOM WALK ON SELECTED STOCK MARKETS IN AFRICA”. GPH-International Journal of Business Management 6, no. 07 (July 7, 2023): 01-32. Accessed October 2, 2025. https://gphjournal.org/index.php/bm/article/view/913.