TY  - JOUR
TI  - Anatoliĭ Illarionovič Širšov (on his fiftieth birthday)
JO  - Algebra i logika
PY  - 1971
SP  - 475
EP  - 479
VL  - 10
IS  - 4
UR  - http://geodesic.mathdoc.fr/item/AL_1971_10_4_a7/
LA  - ru
ID  - AL_1971_10_4_a7
ER  -