FARRELLY, G. E.; SOBOL, M. G. Forecasting, Reporting, And Coping With Systematic Risk. Journal of Applied Business Research (JABR), [S. l.], v. 3, n. 2, p. 24–38, 1987. DOI: 10.19030/jabr.v3i2.6529. Disponível em: https://clutejournals.com/index.php/JABR/article/view/6529. Acesso em: 17 jul. 2024.