TY  - JOUR
AU  - Neumann, Walter D
TI  - Immersed and virtually embedded π1–injective surfaces in graph manifolds
JO  - Algebraic and Geometric Topology
PY  - 2001
SP  - 411
EP  - 426
VL  - 1
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.2140/agt.2001.1.411/
DO  - 10.2140/agt.2001.1.411
ID  - 10_2140_agt_2001_1_411
ER  -