TY  - JOUR
AU  - G. A. Mesyats
TI  - Extons in rule of three points
JO  - Doklady Akademii Nauk
PY  - 1994
SP  - 610
EP  - 612
VL  - 336
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1994_336_5_a9/
LA  - ru
ID  - DAN_1994_336_5_a9
ER  -