LE THI, H.-M. Applications of the Z transformation in calculating sum of a series. HPU2 Journal of Science: Natural Sciences and Technology, [S. l.], v. 2, n. 3, p. 13–18, 2023. DOI: 10.56764/hpu2.jos.2023.2.3.13-18. Disponível em: http://sj.hpu2.edu.vn/index.php/journal/article/view/212. Acesso em: 18 oct. 2024.