%0 Journal Article %T Recense %J Applications of Mathematics %D 1968 %P 356-360 %V 13 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1968.103179/ %R 10.21136/AM.1968.103179 %G cz %F 10_21136_AM_1968_103179