TY  - JOUR
AU  - N. V. Beljakin
TI  - A variant of Richter's constructive ordinals
JO  - Algebra i logika
PY  - 1969
SP  - 154
EP  - 171
VL  - 8
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1969_8_2_a1/
LA  - ru
ID  - AL_1969_8_2_a1
ER  -