@article{10_4153_CMB_2000_004_5,
     author = {Bounkhel, M. and Thibault, L.},
     title = {Subdifferential {Regularity} of {Directionally} {Lipschitzian} {Functions}},
     journal = {Canadian mathematical bulletin},
     pages = {25--36},
     year = {2000},
     volume = {43},
     number = {1},
     doi = {10.4153/CMB-2000-004-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2000-004-5/}
}