TY  - JOUR
AU  - Kobak, Piotr
TI  - The structure tensor and first order natural differential operators
JO  - Archivum mathematicum
PY  - 1992
SP  - 121
EP  - 138
VL  - 28
IS  - 3-4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ARM_1992__28_3-4_a0/
LA  - en
ID  - ARM_1992__28_3-4_a0
ER  -