@article{10_4064_sm153_1_6,
     author = {T. Gaspari},
     title = {On the range of the derivative of a real-valued
 function with bounded support},
     journal = {Studia Mathematica},
     pages = {81--99},
     publisher = {mathdoc},
     volume = {153},
     number = {1},
     year = {2002},
     doi = {10.4064/sm153-1-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm153-1-6/}
}