@article{M2AN_1981__15_4_321_0,
     author = {Delahaye, Jean-Paul},
     title = {Optimalit\'e du proc\'ed\'e $\Delta ^2$ {d{\textquoteright}Aitken} pour l{\textquoteright}acc\'el\'eration de la convergence lin\'eaire},
     journal = {RAIRO. Analyse num\'erique},
     pages = {321--330},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {15},
     number = {4},
     year = {1981},
     mrnumber = {642496},
     zbl = {0468.65002},
     language = {fr},
     url = {http://www.numdam.org/item/M2AN_1981__15_4_321_0/}
}