TY - JOUR AU - Yu. L. Ershov TI - Letter to the editors: ``Forcing in admissible sets'' [Algebra and Logic {\bf 29} (1990), no.~6, 424--430; MR1159138] JO - Algebra i logika PY - 1993 SP - 222 EP - 223 VL - 32 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AL_1993_32_2_a7/ LA - ru ID - AL_1993_32_2_a7 ER -