TY  - JOUR
AU  - Berrick, A J
AU  - Davydov, A A
TI  - Splitting of Gysin extensions
JO  - Algebraic and Geometric Topology
PY  - 2001
SP  - 743
EP  - 762
VL  - 1
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.2140/agt.2001.1.743/
DO  - 10.2140/agt.2001.1.743
ID  - 10_2140_agt_2001_1_743
ER  -