%0 Journal Article %A Tumajer, FrantiĊĦek %T Derivative of the norm of a linear mapping and its application to differential equations %J Applications of Mathematics %D 1992 %P 193-199 %V 37 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1992.104503/ %R 10.21136/AM.1992.104503 %G en %F 10_21136_AM_1992_104503