SKYBYTSKYI, N. M. Robust time to buy and sell stock. Journal of Numerical and Applied Mathematics, [S. l.], n. 1, p. 90–100, 2025. DOI: 10.17721/2706-9699.2025.1.08. Disponível em: https://jnam.knu.ua/index.php/jnam/article/view/190. Acesso em: 7 feb. 2026.