TY  - JOUR
AU  - A. N. Degtev
TI  - Recursive-combinatorial properties of subsets of natural
JO  - Algebra i logika
PY  - 1990
SP  - 303
EP  - 314
VL  - 29
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1990_29_3_a2/
LA  - ru
ID  - AL_1990_29_3_a2
ER  -