%0 Journal Article
%A Ernie Croot
%A Vsevolod F. Lev
%A Péter Pál Pach
%T Progression-free sets in $\mathbb Z_4^n$ are exponentially small
%J Annals of mathematics
%D 2017
%P 331-337
%V 185
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4007/annals.2017.185.1.7/
%R 10.4007/annals.2017.185.1.7
%G en
%F 10_4007_annals_2017_185_1_7