%0 Journal Article %T Recense %J Applications of Mathematics %D 1973 %P 462-464 %V 18 %N 6 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1973.103502/ %R 10.21136/AM.1973.103502 %G cs %F 10_21136_AM_1973_103502