Hassan, Sallahuddin, and Musa Murtala. “The Role of Domestic Private Investment in Promoting Per Capita Income Convergence Amongst Association of Southeast Asian Nations-5 Economies”. International Journal of Economics and Financial Issues, vol. 6, no. 4, Oct. 2016, pp. 1299-03, https://econjournals.com/index.php/ijefi/article/view/2572.