TY - BOOK AU - Saveliev,Nikolai TI - Invariants for homology 3-Spheres T2 - Encyclopaedia of mathematical sciences, SN - 3540437967 (empastado) AV - QA613.2 S377 PY - 2002/// CY - Berlin PB - Springer Verlag KW - Variedades tridimensionales (TopologĂ­a) KW - Invariantes ER -