%0 Journal Article %A Kojecký, Tomáš %T Some functions of eigenvalues of normal operator %J Applications of Mathematics %D 1990 %P 356-360 %V 35 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1990.104417/ %R 10.21136/AM.1990.104417 %G en %F 10_21136_AM_1990_104417