Nairobi, N., Russel, E., Ambya, A., Darmawan, A., Usman, M., & Wamiliana, W. (2020). Dynamic Modeling Data Export Oil and Gas and Non-Oil and Gas by ARMA(2,1)-GARCH(1,1) Model: Study of Indonesian’s Export over the Years 2008-2019. International Journal of Energy Economics and Policy, 10(6), 175–184. Retrieved from https://www.econjournals.com/index.php/ijeep/article/view/9892