@article{10_4153_CMB_2003_047_2,
     author = {Bachir, M. and Lancien, G.},
     title = {On the {Composition} of {Differentiable} {Functions}},
     journal = {Canadian mathematical bulletin},
     pages = {481--494},
     year = {2003},
     volume = {46},
     number = {4},
     doi = {10.4153/CMB-2003-047-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2003-047-2/}
}