TY - JOUR AU - M. Sinharoy TI - Remarks on Darboux and Mean value properties of approximate derivatives JO - Commentationes Mathematicae PY - 1983 SP - 315 EP - 324 VL - 23 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v23i2.6067/ DO - 10.14708/cm.v23i2.6067 LA - pl ID - 10_14708_cm_v23i2_6067 ER -