TY  - JOUR
AU  - Doktor, Pavel
TI  - On the density of smooth functions in certain subspaces of Sobolev space
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1973
SP  - 609
EP  - 622
VL  - 14
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1973__14_4_a2/
LA  - en
ID  - CMUC_1973__14_4_a2
ER  -