TY  - JOUR
AU  - G. S. Tseitin
TI  - The lower estimate of number of steps for reversing normal algorithms and other similar algorithms
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1971
SP  - 243
EP  - 262
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1971_20_a22/
LA  - ru
ID  - ZNSL_1971_20_a22
ER  -