TY  - JOUR
AU  - Mario Salvetti
TI  - On the number of non-equivalent differentiable structures on 4-Manifolds.
JO  - Manuscripta mathematica
PY  - 1989
SP  - 157
EP  - 172
VL  - 63
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1989__63_3_155374/
ID  - MM2_1989__63_3_155374
ER  -