%0 Journal Article %T Recense %J Applications of Mathematics %D 1970 %P 465-475 %V 15 %N 6 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1970.103317/ %R 10.21136/AM.1970.103317 %G cs %F 10_21136_AM_1970_103317