LE PEUTREC, D. Small singular values of an extracted matrix of a Witten complex. CUBO, A Mathematical Journal, [S. l.], v. 11, n. 4, p. 49–57, 2009. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1452. Acesso em: 12 oct. 2025.