%0 Journal Article %A Ido Efrat %T The Cohomology of Canonical Quotients of Free Groups and Lyndon Words %J Documenta mathematica %D 2017 %P 973-997 %V 22 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/584/ %R 10.4171/dm/584 %F 10_4171_dm_584