Montesinos Amilibia, José MaríaOuterelo Dominguez, Enrique2023-06-212023-06-21198684-7491-207-5https://hdl.handle.net/20.500.14352/65469The main result of this paper is a new proof of a theorem which, as the author observes, is due to M. Sakuma [Math. Sem. Notes Kobe Univ. 9 (1981), no. 1, 159–180;]: For every closed, oriented, connected 3-manifold M3, there exists an Fg-bundle W3 over S1, where Fg is a closed, oriented and connected surface of genus g, such that W3 is a 2-fold branched cover of M3.book partmetadata only access515.1open-bookhyperbolic manifoldclosed orientable 3-manifoldsurface bundle over S 12m-fold branched cyclic coveringTopología1210 Topología