MCDOWALL, Stephen. Optical Tomography for Media with Variable Index of Refraction. CUBO, A Mathematical Journal, [S. l.], v. 11, n. 5, p. 71–97, 2009. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1445. Acesso em: 20 dec. 2025.