TY  - JOUR
AU  - N. M. Ermolaeva
TI  - Arithmetic sums of recursively-projective sets
JO  - Doklady Akademii Nauk
PY  - 1967
SP  - 1011
EP  - 1013
VL  - 172
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1967_172_5_a4/
LA  - ru
ID  - DAN_1967_172_5_a4
ER  -