THOMSON, D.; VAN VUUREN, G. Forecasting The South African Business Cycle Using Fourier Analysis. International Business & Economics Research Journal (IBER), [S. l.], v. 15, n. 4, p. 175–192, 2016. DOI: 10.19030/iber.v15i4.9755. Disponível em: https://clutejournals.com/index.php/IBER/article/view/9755. Acesso em: 16 may. 2022.