%0 Journal Article %T Recense %J Applications of Mathematics %D 1972 %P 234-242 %V 17 %N 3 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1972.103412/ %R 10.21136/AM.1972.103412 %G cs %F 10_21136_AM_1972_103412