TY  - JOUR
AU  - V. I. Berdyshev
TI  - Two methods of characterizing the visibility of a~moving point
JO  - Trudy Instituta matematiki i mehaniki
PY  - 2008
SP  - 69
EP  - 81
VL  - 14
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TIMM_2008_14_3_a5/
LA  - ru
ID  - TIMM_2008_14_3_a5
ER  -