%0 Journal Article %A Marek, Ivo %T A note on the minimax principle for $K$-positive operators %J Commentationes Mathematicae Universitatis Carolinae %D 1967 %P 311-314 %V 08 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1967__8_2_a11/ %G en %F CMUC_1967__8_2_a11