TIAN, Xinyu. The summation method and application of power series. Highlights in Science, Engineering and Technology, [S. l.], v. 72, p. 1036–1042, 2023. DOI: 10.54097/fc559p54. Disponível em: https://drpress.org/ojs/index.php/HSET/article/view/13557. Acesso em: 23 may. 2026.