APPLICATION OF THE HARMONIC ANALYSIS TO DETERMINE STRENGTH AND LENGTH OF CYCLES IN THE STOCK MARKET. Research Bulletins of the Faculty of Economic Sciences, [S. l.], v. 1, n. 18, p. 123–137, 2021. Disponível em: https://www.ezeszyty.wne.tu.koszalin.pl/index.php/zeszyty/article/view/185. Acesso em: 11 dec. 2025.