TY  - JOUR
AU  - Ekholm, Tobias
TI  - Regular homotopy and total curvature II: sphere immersions into 3–space
JO  - Algebraic and Geometric Topology
PY  - 2006
SP  - 493
EP  - 512
VL  - 6
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.493/
DO  - 10.2140/agt.2006.6.493
ID  - 10_2140_agt_2006_6_493
ER  -