TY  - JOUR
TI  - Some open 

 problems
JO  - Novi Sad Journal of Mathematics
PY  - 2004
SP  - 187
EP  - 190
VL  - 34
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NSJOM_2004_34_2a_15/
ID  - NSJOM_2004_34_2a_15
ER  -