TY  - JOUR
AU  - Timo Ravaska
TI  - Frenet theory of surfaces
JO  - Annales Fennici Mathematici
PY  - 1979
SP  - 151
EP  - 168
VL  - 4
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1978-79.0421/
DO  - 10.5186/aasfm.1978-79.0421
LA  - en
ID  - AFM_1979_4_1_a13
ER  -