%0 Journal Article %A Boris Shekhtman %A Lesław Skrzypek %T Uniqueness of minimal projections onto two-dimensional subspaces %J Studia Mathematica %D 2005 %P 273-284 %V 168 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm168-3-6/ %R 10.4064/sm168-3-6 %G en %F 10_4064_sm168_3_6