%0 Journal Article %A N. Vavilov %T Commutators of congruence subgroups in the arithmetic case %J Zapiski Nauchnykh Seminarov POMI %D 2019 %P 5-22 %V 479 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2019_479_a0/ %G en %F ZNSL_2019_479_a0