TY  - JOUR
AU  - Yu. L. Ershov
TI  - Necessary Isomorphism Conditions for Rogers Semilattices of Finite Partially Ordered Sets
JO  - Algebra i logika
PY  - 2003
SP  - 413
EP  - 421
VL  - 42
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2003_42_4_a1/
LA  - ru
ID  - AL_2003_42_4_a1
ER  -