TY  - JOUR
AU  - V. M. Fedorov
TI  - Haken’s algorithm is primitive recursive
JO  - Doklady Akademii Nauk
PY  - 1976
SP  - 787
EP  - 788
VL  - 226
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1976_226_4_a12/
LA  - ru
ID  - DAN_1976_226_4_a12
ER  -