Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1979__29_1_a2, author = {Mi\v{s}{\'\i}k, Ladislav}, title = {Extreme essential derivatives of {Borel} and {Lebesgue} measurable functions}, journal = {Mathematica slovaca}, pages = {25--38}, publisher = {mathdoc}, volume = {29}, number = {1}, year = {1979}, mrnumber = {561773}, zbl = {0411.28006}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1979__29_1_a2/} }
Mišík, Ladislav. Extreme essential derivatives of Borel and Lebesgue measurable functions. Mathematica slovaca, Tome 29 (1979) no. 1, pp. 25-38. http://geodesic.mathdoc.fr/item/MASLO_1979__29_1_a2/