TY  - JOUR
TI  - Yurii Leonidovich Ershov (on his 80th birthday)
JO  - Algebra i logika
PY  - 2020
SP  - I
EP  - V
VL  - 59
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2020_59_3_a0/
LA  - ru
ID  - AL_2020_59_3_a0
ER  -