TY  - JOUR
AU  - T. V. Dubrovina
AU  - N. I. Dubrovin
TI  - Roots in the universal covering group of the unimodular $2\times2$-matrix group
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 2000
SP  - 757
EP  - 776
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_2000_6_3_a8/
LA  - ru
ID  - FPM_2000_6_3_a8
ER  -