@article{JCA_2009_16_2_JCA_2009_16_2_a6,
     author = {L. Vesely and L. Zaj{\'\i}cek},
     title = {On {Compositions} of {D.C.Functions} and {Mappings}},
     journal = {Journal of convex analysis},
     pages = {423--439},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2009},
     url = {http://geodesic.mathdoc.fr/item/JCA_2009_16_2_JCA_2009_16_2_a6/}
}