TY - JOUR AU - Kundu, N. K. TI - On symmetric derivatives and on properties of Zahorski JO - Czechoslovak Mathematical Journal PY - 1976 SP - 154 EP - 160 VL - 26 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101382/ DO - 10.21136/CMJ.1976.101382 LA - en ID - 10_21136_CMJ_1976_101382 ER -