%0 Journal Article %T News and Notices %J Applications of Mathematics %D 1960 %P 476-490 %V 5 %N 6 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1960.102733/ %R 10.21136/AM.1960.102733 %G cs %F 10_21136_AM_1960_102733