Khalil I. T. AL-DOSARY. Study on Periodicity and Transformation of Difference Equations. Current Topics on Mathematics and Computer Science Vol. 7, [S. l.], p. 32–41, 2021. DOI: 10.9734/bpi/ctmcs/v7/11651D. Disponível em: https://stm.bookpi.org/CTMCS-V7/article/view/2934. Acesso em: 13 jun. 2026.