STÁDNÍK, Bohumil. The riddle of volatility clusters. Business: Theory and Practice, [S. l.], v. 15, n. 2, p. 140–148, 2014. DOI: 10.3846/btp.2014.14. Disponível em: https://journals.vilniustech.lt/index.php/BTP/article/view/8389. Acesso em: 9 may. 2025.