1. Random Walk: Introduction, GBM, Simulation (quantinsti.com)
2. Random Walk Theory Definition, History, Implications of the Theory (corporatefinanceinstitute.com)
3. The Wall Street Journal contests: the experts, the darts, and the efficient market hypothesis
4. Random walks and market efficiency in European equity markets;Worthington;The Global Journal of Finance and Economics,2004
5. Augmented Dickey Fuller Test