TY  - JOUR
AU  - Yu. I. Kulakov
TI  - The geometry of spaces of constant curvature as a special case of the theory of physical structures
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 985
EP  - 987
VL  - 193
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_193_5_a5/
LA  - ru
ID  - DAN_1970_193_5_a5
ER  -