DOUANGVILAYKEO, Phetdavanh. 2021. “Forecasting the Banque Pour Le Commerce Exterieur Lao Public Stock’ Return During the Covid-19 Pandemic Using the Box-Jenkins Approach”. Souphanouvong University Journal Multidisciplinary Research and Development 7 (2):200-208. http://www.su-journal.com/index.php/su/article/view/135.