ZINGER, A. The Determinant Line Bundle for Fredholm Operators: Construction, Properties, and Classification. MATHEMATICA SCANDINAVICA, [S. l.], v. 118, n. 2, p. 203–268, 2016. DOI: 10.7146/math.scand.a-23687. Disponível em: https://www.mscand.dk/article/view/23687. Acesso em: 17 jan. 2022.