TY  - JOUR
AU  - F. M. Filipczak
TI  - On the derivative of a discontinuous function
JO  - Colloquium Mathematicum
PY  - 1964
SP  - 73
EP  - 79
VL  - 13
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-13-1-73-79/
DO  - 10.4064/cm-13-1-73-79
LA  - en
ID  - 10_4064_cm_13_1_73_79
ER  -