TY  - JOUR
AU  - S. Benarab
AU  - E. S. Zhukovskiy
AU  - W. Merchela
TI  - Theorems on perturbations of covering mappings in spaces with a distance and in spaces with a binary relation
JO  - Trudy Instituta matematiki i mehaniki
PY  - 2019
SP  - 52
EP  - 63
VL  - 25
IS  - 4
UR  - http://geodesic.mathdoc.fr/item/TIMM_2019_25_4_a4/
LA  - ru
ID  - TIMM_2019_25_4_a4
ER  -