RAHAYAAN, A. L.; AGUNG DURYA, N. P. M. Analysis of Trading Volume Activity Before And After The Announcement Of Covid-19 at PT Indosat. International Journal of Economics, Social Science, Entrepreneurship and Technology (IJESET), [S. l.], v. 1, n. 5, p. 316–325, 2022. DOI: 10.55983/ijeset.v1i5.212. Disponível em: http://journal.sinergicendikia.com/index.php/ijeset/article/view/212. Acesso em: 27 jul. 2026.