XIANG, Jikang. Introduction to Integration and Techniques to Calculate Integrals. Highlights in Science, Engineering and Technology, [S. l.], v. 88, p. 487–492, 2024. DOI: 10.54097/2b8ae096. Disponível em: https://drpress.org/ojs/index.php/HSET/article/view/18977. Acesso em: 31 jul. 2026.