TY  - JOUR
AU  - Pawlak, Ryszard J.
TI  - On Darboux points and the perfectly closed class of functions
JO  - Acta Universitatis Lodziensis. Folia Mathematica
PY  - 1991
VL  - 04
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AULFM_1991_04_a6/
LA  - en
ID  - AULFM_1991_04_a6
ER  -