TY  - JOUR
AU  - V. P. Orevkov
TI  - Lower bounds for the lengths of deductions in arithmetic in terms
JO  - Doklady Akademii Nauk
PY  - 1987
SP  - 784
EP  - 787
VL  - 294
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1987_294_4_a2/
LA  - ru
ID  - DAN_1987_294_4_a2
ER  -