TY  - JOUR
AU  - I. A. Kruglov
AU  - I. V. Cherednik
TI  - On the existence of non-negative bases in subgroups of free groups of Schreier varieties
JO  - Matematičeskie voprosy kriptografii
PY  - 2019
SP  - 53
EP  - 65
VL  - 10
IS  - 4
UR  - http://geodesic.mathdoc.fr/item/MVK_2019_10_4_a3/
LA  - ru
ID  - MVK_2019_10_4_a3
ER  -