Mushori, Sabastine, and Delson Chikobvu. “Investment Opportunities, Uncertain Implicit Transaction Costs and Maximum Downside Risk in Dynamic Stochastic Financial Optimization”. International Journal of Economics and Financial Issues, vol. 8, no. 4, July 2018, pp. 256-64, https://econjournals.com/index.php/ijefi/article/view/6114.