TY - JOUR AU - Dror Farjoun, Emmanuel AU - Mikhailov, Roman TI - On the third homotopy group of Orr’s space JO - Algebraic and Geometric Topology PY - 2018 SP - 569 EP - 582 VL - 18 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2140/agt.2018.18.569/ DO - 10.2140/agt.2018.18.569 ID - 10_2140_agt_2018_18_569 ER -