On the first derivative of real functions (Preliminary communication)
Preiss, David
Commentationes Mathematicae Universitatis Carolinae, Tome 011 (1970), p. 817-822 / Harvested from Czech Digital Mathematics Library
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Publié le : 1970-01-01
Classification:  26-40,  26A24,  26Axx 
@article{105315,
     author = {David Preiss},
     title = {On the first derivative of real functions (Preliminary communication)},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     volume = {011},
     year = {1970},
     pages = {817-822},
     zbl = {0206.06602},
     mrnumber = {0274669},
     language = {en},
     url = {http://dml.mathdoc.fr/item/105315}
}

Preiss, David. On the first derivative of real functions (Preliminary communication). Commentationes Mathematicae Universitatis Carolinae, Tome 011 (1970) pp. 817-822. http://gdmltest.u-ga.fr/item/105315/

Z. Zahorski Sur la première dérivée, Trans. Amer. Math. Soc. 69 (1950), 1-54. (1950) | MR 0037338 | Zbl 0038.20602

J. S. Lipiński Une propriété des ensembles ${f'(x)>a}$, Fund. Math. 42 (1955), 339-342. (1955) | MR 0076842