%0 Journal Article %A Adimurthi %A Frédéric Robert %A Michael Struwe %T Concentration phenomena for Liouville's equation in dimension four %J Journal of the European Mathematical Society %D 2006 %P 171-180 %V 8 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/44/ %R 10.4171/jems/44 %F JEMS_2006_8_2_a2