@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/}
}