WAHDE, Gösta. Interpolation in Non-Quasi-Analytic Classes of Infinitely Differentiable Functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 20, p. 19–31, 1967. DOI: 10.7146/math.scand.a-10815. Disponível em: https://tidsskrift.dk/math/article/view/10815. Acesso em: 14 aug. 2026.