ČAP, A.; SLOVÁK, J. Weyl structures for parabolic geometries. MATHEMATICA SCANDINAVICA, [S. l.], v. 93, n. 1, p. 53–90, 2003. DOI: 10.7146/math.scand.a-14413. Disponível em: https://www.mscand.dk/article/view/14413. Acesso em: 29 apr. 2024.