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@article{AM2_1985__29_137077, author = {A. J\'arai}, title = {Derivatives are {Borel} functions.}, journal = {Aequationes mathematicae}, pages = {24--27}, publisher = {mathdoc}, volume = {29}, year = {1985}, zbl = {0621.26006}, url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137077/} }
A. Járai. Derivatives are Borel functions.. Aequationes mathematicae, Tome 29 (1985), pp. 24-27. http://geodesic.mathdoc.fr/item/AM2_1985__29_137077/