%0 Journal Article %A Foniok, Jan %A Tardif, Claude %T Adjoint functors and tree duality %J Discrete mathematics & theoretical computer science %D 2009 %V 11 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.458/ %R 10.46298/dmtcs.458 %G en %F DMTCS_2009_11_2_a7