@article{bwmeta1.element.desklight-18e10553-c9ce-466b-803c-ce30f478b510,
author = {H. H. Pu and H. W. Pu},
title = {On the set where an approximate derivative is a derivative},
journal = {Colloquium Mathematicae},
volume = {43},
year = {1980},
pages = {155-160},
zbl = {0469.26001},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-18e10553-c9ce-466b-803c-ce30f478b510}
}
H. H. Pu; H. W. Pu. On the set where an approximate derivative is a derivative. Colloquium Mathematicae, Tome 43 (1980) pp. 155-160. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-18e10553-c9ce-466b-803c-ce30f478b510/