BERGER, David; SCHILLING, René L. On the Liouville and strong Liouville properties for a class of non-local operators. Mathematica Scandinavica, Berkeley, CA, United States, v. 128, n. 2, 2022. DOI: 10.7146/math.scand.a-132068. Disponível em: https://journals.msp.org/mscand/article/view/116. Acesso em: 24 jul. 2026.