CHUNG, Lung Ock. Manifolds carrying bounded quasiharmonic but no bounded harmonic functions. Mathematica Scandinavica, Berkeley, CA, United States, v. 37, p. 264–270, 1975. DOI: 10.7146/math.scand.a-11605. Disponível em: https://journals.msp.org/mscand/article/view/2068. Acesso em: 25 jul. 2026.