TY - JOUR AU - Montesinos Amilibia, José María PY - 1973 SN - 0037-8615 UR - https://hdl.handle.net/20.500.14352/64857 T2 - Boletín de la Sociedad Matemática Mexicana. Segunda Serie AB - If L is a link in the 3-sphere S3, let e:L˜→S3 denote the 2-fold cyclic covering of S3 branched over L. R. H. Fox [Rev. Mat. Hisp.-Amer. (4) 32 (1972), 158–166;] has shown that there is no link L in S3 such that L˜ is S1×S1×S1; the author [ibid. (4)... LA - spa M2 - 1 PB - Sociedad Matemática Mexicana KW - Seifert manifolds TI - Seifert manifolds that are ramified two-sheeted cyclic coverings. (Spanish) TY - journal article VL - 2 ER -