TY - JOUR TI - News and Notices JO - Applications of Mathematics PY - 1972 VL - 17 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1972.103397/ DO - 10.21136/AM.1972.103397 LA - cz ID - 10_21136_AM_1972_103397 ER -