TY  - JOUR
AU  - N. B. Bezverkhnyaya
TI  - Description of hyperbolic and nonhyperbolic groups that are certain $HNN$-extensions of free groups
JO  - Čebyševskij sbornik
PY  - 2002
SP  - 17
EP  - 31
VL  - 3
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CHEB_2002_3_1_a3/
LA  - ru
ID  - CHEB_2002_3_1_a3
ER  -