DG/0211159。 Perelman, Grisha (10 March 2003). "Ricci flow with surgery on three-manifolds". arXiv:math.DG/0303109。 Perelman, Grisha (17 July 2003). "Finite extinction
fields, Ann. scient. ´Ec. Norm. Sup. 6 (1973), 521-552. ^ A. Reznikov, Three-manifolds class field theory (Homology of coverings for a nonvirtually b1-positive