TY  - JOUR
AU  - Ronnie Lee
AU  - D.M. Wilczynski
TI  - Locally flat 2-spheres in simply connected 4-manifolds.
JO  - Commentarii mathematici Helvetici
PY  - 1990
SP  - 388
EP  - 412
VL  - 65
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140202/
ID  - CMH_1990__65_3_140202
ER  -