@article{M2AN_1986__20_3_371_0,
     author = {Cea, Jean},
     title = {Conception optimale ou identification de formes, calcul rapide de la d\'eriv\'ee directionnelle de la fonction co\^ut},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {371--402},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {20},
     number = {3},
     year = {1986},
     mrnumber = {862783},
     zbl = {0604.49003},
     language = {fr},
     url = {http://www.numdam.org/item/M2AN_1986__20_3_371_0/}
}