Spherical Approximation on Unit Sphere. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences, [S. l.], v. 26, n. 3, p. 61–68, 2018. DOI: 10.29196/jub.v26i3.561. Disponível em: https://www.journalofbabylon.com/index.php/JUBPAS/article/view/561. Acesso em: 17 may. 2025.