%0 Journal Article %T Zprávy %J Applications of Mathematics %D 1958 %P 79-80 %V 3 %N 1 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1958.102605/ %R 10.21136/AM.1958.102605 %G cs %F 10_21136_AM_1958_102605