%0 Journal Article %T Recense %J Applications of Mathematics %D 1969 %P 81-86 %V 14 %N 1 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1969.103208/ %R 10.21136/AM.1969.103208 %G cs %F 10_21136_AM_1969_103208