TY  - JOUR
AU  - V. I. Berdyshev
TI  - Navigation by means of the field of altitudes and its fragment
JO  - Trudy Instituta matematiki i mehaniki
PY  - 2003
SP  - 26
EP  - 37
VL  - 9
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/TIMM_2003_9_1_a3/
LA  - ru
ID  - TIMM_2003_9_1_a3
ER  -