TY  - JOUR
AU  - N. V. Stepanov
TI  - Joint invariants of two families of curves on the plane
JO  - Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara
PY  - 1969
SP  - 299
EP  - 331
VL  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/INTG_1969_2_a13/
LA  - ru
ID  - INTG_1969_2_a13
ER  -