%0 Journal Article %T Recense %J Applications of Mathematics %D 1963 %P 156-161 %V 8 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1963.102847/ %R 10.21136/AM.1963.102847 %G cs %F 10_21136_AM_1963_102847