JAVED , Adnan et al. Predictability Of Returns: A Case Study Of Karachi Stock Exchange, Pakistan . Business & Economic Review, [S.l.], v. 1, n. 1, p. 25-28, oct. 2009. ISSN 2519-1233. Available at: <https://bereview.pk/index.php/BER/article/view/26>. Date accessed: 21 june 2021.