@article{10_4064_cm_39_2_277_284,
     author = {Richard J. Fleissner and James Foran},
     title = {Transformations of differentiable functions},
     journal = {Colloquium Mathematicum},
     pages = {277--284},
     year = {1978},
     volume = {39},
     number = {2},
     doi = {10.4064/cm-39-2-277-284},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-39-2-277-284/}
}