%0 Journal Article %T Recense %J Applications of Mathematics %D 1971 %P 155-162 %V 16 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1971.103338/ %R 10.21136/AM.1971.103338 %G cs %F 10_21136_AM_1971_103338