@article{bwmeta1.element.bwnjournal-article-fmv65i1p31bwm,
author = {Jack Ceder},
title = {Differentiable roads for real functions},
journal = {Fundamenta Mathematicae},
volume = {64},
year = {1969},
pages = {351-358},
zbl = {0188.12003},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv65i1p31bwm}
}
Ceder, Jack. Differentiable roads for real functions. Fundamenta Mathematicae, Tome 64 (1969) pp. 351-358. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv65i1p31bwm/