TY  - JOUR
AU  - Konopka 

 Czesław,
TI  - On extrinsic spheres in 

 a locally product riemannian manifold
JO  - Novi Sad Journal of Mathematics
PY  - 1992
SP  - 141
EP  - 148
VL  - 22
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NSJOM_1992_22_1a_13/
ID  - NSJOM_1992_22_1a_13
ER  -