@article{AMBP_2003__10_2_181_0,
     author = {Mohamed Akkouchi and Abdellah Bounabat and Manfred Goebel},
     title = {Optimality {Conditions} for a {Nonlinear} {Boundary} {Value} {Problem} {Using} {Nonsmooth} {Analysis}},
     journal = {Annales math\'ematiques Blaise Pascal},
     pages = {181--194},
     publisher = {Annales math\'ematiques Blaise Pascal},
     volume = {10},
     number = {2},
     year = {2003},
     doi = {10.5802/ambp.173},
     mrnumber = {2031268},
     zbl = {1048.49013},
     language = {en},
     url = {https://ambp.centre-mersenne.org/articles/10.5802/ambp.173/}
}