TY  - JOUR
AU  - M. A. Akivis
TI  - On an invariant differential-geometric characteristic of the Dupin cyclide
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1965
VL  - 20
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1965_20_1_a7/
LA  - ru
ID  - RM_1965_20_1_a7
ER  -