TY - JOUR TI - News and Notices JO - Applications of Mathematics PY - 1979 SP - 160 VL - 24 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1979.103791/ DO - 10.21136/AM.1979.103791 LA - cs ID - 10_21136_AM_1979_103791 ER -