TY  - JOUR
AU  - A. G. Pinus
TI  - Elementary Equivalence of Derived Structures of Free Semigroups, Unars, and Groups
JO  - Algebra i logika
PY  - 2004
SP  - 730
EP  - 748
VL  - 43
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2004_43_6_a4/
LA  - ru
ID  - AL_2004_43_6_a4
ER  -