TY - JOUR TI - News and Notices JO - Czechoslovak Mathematical Journal PY - 1968 SP - 568 EP - 569 VL - 18 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1968.100852/ DO - 10.21136/CMJ.1968.100852 LA - de ID - 10_21136_CMJ_1968_100852 ER -