TY  - JOUR
AU  - V. R. Kireitov
TI  - On some properties of photometric quantities on a Riemannian manifold
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 21
EP  - 26
VL  - 255
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_255_1_a3/
LA  - ru
ID  - DAN_1980_255_1_a3
ER  -