TY  - JOUR
AU  - I. M. Sheinbergas
TI  - Simple bases and the number of functions in certain classes introduced by Post
JO  - Matematičeskie zametki
PY  - 1970
SP  - 105
EP  - 114
VL  - 8
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1970_8_1_a11/
LA  - ru
ID  - MZM_1970_8_1_a11
ER  -