Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1986__27_1_a6, author = {Matou\v{s}ek, Ji\v{r}{\'\i}}, title = {Approximate symmetric derivative and monotonicity}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {83--86}, publisher = {mathdoc}, volume = {27}, number = {1}, year = {1986}, mrnumber = {843422}, zbl = {0586.26004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1986__27_1_a6/} }
Matoušek, Jiří. Approximate symmetric derivative and monotonicity. Commentationes Mathematicae Universitatis Carolinae, Tome 27 (1986) no. 1, pp. 83-86. http://geodesic.mathdoc.fr/item/CMUC_1986__27_1_a6/