Kristanti, Farida Titik, Dwi Fitrizal Salim, Arum Indrasari, and Zaenal Aripin. “A Stock Portfolio Strategy in the Midst of the COVID-19: Case of Indonesia”. Journal of Eastern European and Central Asian Research (JEECAR) 9, no. 3 (June 4, 2022): 422–431. Accessed May 16, 2024. https://ieeca.org/journal/index.php/JEECAR/article/view/822.