TY  - JOUR
AU  - Michael J. Evans
TI  - On continuous functions and the approximate symmetric derivatives
JO  - Colloquium Mathematicum
PY  - 1974
SP  - 129
EP  - 136
VL  - 31
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-31-1-129-136/
DO  - 10.4064/cm-31-1-129-136
LA  - en
ID  - 10_4064_cm_31_1_129_136
ER  -