SOMA, A. M.; SITEPU, V. B. Comparative analysis of Black-Scholes and GARCH models using collar strategy for hedging in telecommunication industry (Telkom, Xl, Indosat). International Journal of Accounting and Management Information Systems, [S. l.], v. 3, n. 2, p. 137–155, 2025. DOI: 10.35912/ijamis.v3i2.3334. Disponível em: https://goodwoodpub.com/index.php/ijamis/article/view/3334. Acesso em: 21 aug. 2025.