%0 Journal Article %A V. V. Nikulin %T The transition constant for arithmetic hyperbolic reflection groups %J Izvestiya. Mathematics %D 2011 %P 971-1005 %V 75 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2011_75_5_a5/ %G en %F IM2_2011_75_5_a5