%0 Journal Article %T Recense %J Applications of Mathematics %D 1958 %P 150-155 %V 3 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1958.102612/ %R 10.21136/AM.1958.102612 %G cs %F 10_21136_AM_1958_102612