%0 Journal Article %T Recense %J Applications of Mathematics %D 1960 %P 398-400 %V 5 %N 5 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1960.102726/ %R 10.21136/AM.1960.102726 %G cs %F 10_21136_AM_1960_102726