XU, H.-Y.; YI, C.-F.; CAO, T.-B. The uniqueness problem for meromorphic functions in the unit disc sharing values and a set in an angular domain. MATHEMATICA SCANDINAVICA, [S. l.], v. 109, n. 2, p. 240–252, 2011. DOI: 10.7146/math.scand.a-15187. Disponível em: https://www.mscand.dk/article/view/15187. Acesso em: 26 apr. 2024.