Azman Aziz, Mukhriz Izraf, and Jauhari Dahalan. “The Impacts of Oil Price Fluctuations on Revealed Comparative Advantage of Manufacturing Commodities for ASEAN-5 Economies”. International Journal of Energy Economics and Policy, vol. 5, no. 4, Oct. 2015, pp. 1098-0, https://econjournals.com/index.php/ijeep/article/view/1461.