LABUDA, Iwo. Multi-valued Namioka theorems. Mathematica Scandinavica, Berkeley, CA, United States, v. 58, p. 227–235, 1986. DOI: 10.7146/math.scand.a-12142. Disponível em: https://journals.msp.org/mscand/article/view/1489. Acesso em: 25 jul. 2026.