RUSZKOWSKI, Bartosch. Hardy inequalities for the Heisenberg Laplacian on convex bounded polytopes. Mathematica Scandinavica, Berkeley, CA, United States, v. 123, n. 1, p. 101–120, 2018. DOI: 10.7146/math.scand.a-105218. Disponível em: https://journals.msp.org/mscand/article/view/268. Acesso em: 24 jul. 2026.