NANTOMAH, K. On Some Bounds for the Exponential Integral Function. Journal of Nepal Mathematical Society, [S. l.], v. 4, n. 2, p. 28–34, 2021. DOI: 10.3126/jnms.v4i2.41463. Disponível em: https://www.nepjol.info/index.php/jnms/article/view/41463. Acesso em: 2 may. 2024.