PIRANIAN, G. Bounded Radial Variation and Divergence of Power Series. MATHEMATICA SCANDINAVICA, [S. l.], v. 18, p. 93–96, 1966. DOI: 10.7146/math.scand.a-10783. Disponível em: https://www.mscand.dk/article/view/10783. Acesso em: 6 may. 2024.