TY - JOUR AU - J. Wu AU - R. V. Mikhailov TI - Homotopy groups as centres of finitely presented groups JO - Izvestiya. Mathematics PY - 2013 SP - 581 EP - 593 VL - 77 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_2013_77_3_a8/ LA - en ID - IM2_2013_77_3_a8 ER -