%0 Journal Article %A Glen D. Anderson %T Derivatives of the conformal capacity of extremal rings %J Annales Fennici Mathematici %D 1985 %P 29-46 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1985.1006/ %R 10.5186/aasfm.1985.1006 %G en %F AFM_1985_10_1_a5