BADR, Nadine. Real interpolation of Sobolev spaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 105, n. 2, p. 235–264, 2009. DOI: 10.7146/math.scand.a-15117. Disponível em: https://journals.msp.org/mscand/article/view/580. Acesso em: 24 jul. 2026.