LUU, Dinh Quang. Representation theorems for multi-valued (regular) $L^1$-amarts. Mathematica Scandinavica, Berkeley, CA, United States, v. 58, p. 5–22, 1986. DOI: 10.7146/math.scand.a-12125. Disponível em: https://journals.msp.org/mscand/article/view/1506. Acesso em: 25 jul. 2026.