BERGER, D.; SCHILLING, R. L. On the Liouville and strong Liouville properties for a class of non-local operators. MATHEMATICA SCANDINAVICA, [S. l.], v. 128, n. 2, 2022. DOI: 10.7146/math.scand.a-132068. Disponível em: https://www.mscand.dk/article/view/132068. Acesso em: 1 jul. 2022.