KRAGH, T. Orientations on 2-vector Bundles and Determinant Gerbes. MATHEMATICA SCANDINAVICA, [S. l.], v. 113, n. 1, p. 63–82, 2013. DOI: 10.7146/math.scand.a-15482. Disponível em: https://www.mscand.dk/article/view/15482. Acesso em: 17 jan. 2022.