%0 Journal Article %T Recense %J Applications of Mathematics %D 1957 %P 160-162 %V 2 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1957.102563/ %R 10.21136/AM.1957.102563 %G cs %F 10_21136_AM_1957_102563