@article{GDZPPN002323397,
title = {A Hyperbolic Kac-Moody Algebra and the Theory of Siegel Modular Forms of Genus 2.},
journal = {Mathematische Annalen},
volume = {264},
year = {1983},
pages = {87-144},
zbl = {0489.17008},
url = {http://dml.mathdoc.fr/item/GDZPPN002323397}
}
Feingold, Alex J.; Frenkel, Igor B. A Hyperbolic Kac-Moody Algebra and the Theory of Siegel Modular Forms of Genus 2.. Mathematische Annalen, Tome 264 (1983) pp. 87-144. http://gdmltest.u-ga.fr/item/GDZPPN002323397/