TY - JOUR TI - Summaries of articles published in this issue JO - Czechoslovak Mathematical Journal PY - 1970 VL - 20 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1970.100971/ DO - 10.21136/CMJ.1970.100971 LA - en ID - 10_21136_CMJ_1970_100971 ER -