@article{JCA_2001_8_2_JCA_2001_8_2_a5,
     author = {Y Gao and Z.-Q. Xia and L.-W. Zhang},
     title = {Kernelled {Quasidifferential} for a {Quasidifferentiable} {Function} in {Two-Dimensional} {Space}},
     journal = {Journal of convex analysis},
     pages = {401--408},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/JCA_2001_8_2_JCA_2001_8_2_a5/}
}