CARROLL, F. W. A strongly annular function with countably many singular values. MATHEMATICA SCANDINAVICA, [S. l.], v. 44, p. 330–334, 1979. DOI: 10.7146/math.scand.a-11814. Disponível em: https://www.mscand.dk/article/view/11814. Acesso em: 27 apr. 2024.