Lawrence DHLIWAYO; Florance MATARISE; Charles CHIMEDZA. Modelling Volatility and Level Shift in Fractionally Integrated Processes. Novel Research Aspects in Mathematical and Computer Science Vol. 1, [S. l.], p. 118–137, 2022. DOI: 10.9734/bpi/nramcs/v1/2756C. Disponível em: https://stm.bookpi.org/NRAMCS-V1/article/view/6557. Acesso em: 13 jun. 2026.