FARNANA, Zohra. Pointwise regularity for solutions of double obstacle problems on metric spaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 109, n. 2, p. 185–200, 2011. DOI: 10.7146/math.scand.a-15184. Disponível em: https://journals.msp.org/mscand/article/view/513. Acesso em: 24 jul. 2026.