ČAP, Andreas; SLOVÁK, Jan. Weyl structures for parabolic geometries. Mathematica Scandinavica, Berkeley, CA, United States, v. 93, n. 1, p. 53–90, 2003. DOI: 10.7146/math.scand.a-14413. Disponível em: https://journals.msp.org/mscand/article/view/806. Acesso em: 24 jul. 2026.