%0 Journal Article %A S. Kwapień %A A. Pełczyński %T The main triangle projection in matrix spaces and its applications %J Studia Mathematica %D 1970 %P 43-67 %V 34 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-34-1-43-67/ %R 10.4064/sm-34-1-43-67 %G en %F 10_4064_sm_34_1_43_67