%0 Journal Article %T Recense %J Applications of Mathematics %D 1961 %P 470-471 %V 6 %N 6 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1961.102779/ %R 10.21136/AM.1961.102779 %G cs %F 10_21136_AM_1961_102779