%0 Journal Article %A Kilian Raschel %T Counting walks in a quadrant: a unified approach via boundary value problems %J Journal of the European Mathematical Society %D 2012 %P 749-777 %V 14 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/317/ %R 10.4171/jems/317 %F JEMS_2012_14_3_a4