%0 Journal Article %A T. Kilpeläinen %T Convex increasing functions preserve the sub-F-extremality %J Annales Fennici Mathematici %D 1987 %P 55-60 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1987.1216/ %R 10.5186/aasfm.1987.1216 %G en %F AFM_1987_12_1_a5