TY  - JOUR
AU  - A. Markov
TI  - Unsolvability of certain problems in topology
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 978
EP  - 980
VL  - 123
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_123_6_a5/
LA  - ru
ID  - DAN_1958_123_6_a5
ER  -