TY  - JOUR
AU  - N. K. Kundu
TI  - On approximate symmetric derivative
JO  - Colloquium Mathematicum
PY  - 1973
SP  - 275
EP  - 285
VL  - 28
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-28-2-275-285/
DO  - 10.4064/cm-28-2-275-285
LA  - en
ID  - 10_4064_cm_28_2_275_285
ER  -