%0 Journal Article %A Peter Å emrl %T Quadratic functionals and Jordan *-derivations %J Studia Mathematica %D 1990 %P 157-165 %V 97 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-97-3-157-165/ %R 10.4064/sm-97-3-157-165 %G en %F 10_4064_sm_97_3_157_165