%0 Journal Article %A Fabrizio Barroero %A Laura Capuano %A Umberto Zannier %T Betti maps, Pell equations in polynomials and almost-Belyi maps %J Forum of Mathematics, Sigma %D 2022 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1017/fms.2022.77/ %R 10.1017/fms.2022.77 %G en %F 10_1017_fms_2022_77