%0 Journal Article %A Eric Schippers %T The derivative of the Nehari functional %J Annales Fennici Mathematici %D 2010 %P 291-307 %V 35 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2010.3518/ %R 10.5186/aasfm.2010.3518 %G en %F AFM_2010_35_1_a17