TY  - JOUR
AU  - Tang, Wee-Kee
TI  - A Note on Preserved Smoothness
JO  - Serdica Mathematical Journal
PY  - 1996
SP  - 29
EP  - 32
VL  - 22
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SMJ2_1996_22_1_a2/
LA  - en
ID  - SMJ2_1996_22_1_a2
ER  -