%0 Journal Article %T Recense %J Applications of Mathematics %D 1977 %P 455-462 %V 22 %N 6 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1977.103720/ %R 10.21136/AM.1977.103720 %G cs %F 10_21136_AM_1977_103720