Solihin I, Sugiarto S, Ugut G, Hulu E. LQ45 Stock Index Abnormal Return Reaction to the Covid-19 Pandemic: the Even Study Methodology. IIJSE [Internet]. 1Mar.2022 [cited 29Apr.2026];5(1):342-55. Available from: https://e-journal.uac.ac.id/index.php/iijse/article/view/2051