TY  - JOUR
AU  - S. V. Popov
TI  - On the complexity of derivations in classical propositional calculus
JO  - Doklady Akademii Nauk
PY  - 1976
SP  - 1041
EP  - 1044
VL  - 228
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1976_228_5_a7/
LA  - ru
ID  - DAN_1976_228_5_a7
ER  -