TY  - JOUR
AU  - D. V. Lagno
TI  - A~characterization of the imaginary roots of hyperbolic Kac--Moody algebras
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1999
SP  - 636
EP  - 637
VL  - 54
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1999_54_3_a9/
LA  - en
ID  - RM_1999_54_3_a9
ER  -