DU PLESSIS, Andrew; VOSEGAARD, Henrik. Characterisation of strong smooth stability. MATHEMATICA SCANDINAVICA, [S. l.], v. 88, n. 2, p. 193–228, 2001. DOI: 10.7146/math.scand.a-14323. Disponível em: https://tidsskrift.dk/math/article/view/14323. Acesso em: 14 aug. 2026.