TY  - DATA
AU  - Niemann, Peter
TI  - Some generalized Kac-Moody algebras with known root multiplicities 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470403393 (online)
PY  - 2002///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0746
ER  -