TY  - JOUR
AU  - V. N. Kas'yanov
TI  - Distinguishing hammocks in a directed graph
JO  - Doklady Akademii Nauk
PY  - 1975
SP  - 1020
EP  - 1022
VL  - 221
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1975_221_5_a3/
LA  - ru
ID  - DAN_1975_221_5_a3
ER  -