@article{JLT_2004_14_2_JLT_2004_14_2_a0,
     author = {E. Leuzinger},
     title = {Tits {Geometry,} {Arithmetic} {Groups,} and the {Proof} of a {Conjecture} of {Siegel}},
     journal = {Journal of Lie theory},
     pages = {317--338},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {2004},
     url = {http://geodesic.mathdoc.fr/item/JLT_2004_14_2_JLT_2004_14_2_a0/}
}