TY - JOUR AU - . Redaktor TI - SUMMARIES JO - Mathematica Applicanda PY - 1986 SP - 233 EP - 235 VL - 14 IS - 27 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/ma.v14i27.1673/ DO - 10.14708/ma.v14i27.1673 LA - pl ID - 10_14708_ma_v14i27_1673 ER -