TY  - JOUR
AU  - A. S. Morozov
AU  - M. V. Korovina
TI  - $\Sigma$-Definability of countable structures over real numbers, complex numbers, and quaternions
JO  - Algebra i logika
PY  - 2008
SP  - 335
EP  - 363
VL  - 47
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2008_47_3_a3/
LA  - ru
ID  - AL_2008_47_3_a3
ER  -