Note sur la convergence de méthodes de directions conjuguées
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 3 (1969) no. R1, p. 35-43 
@article{M2AN_1969__3_1_35_0,
     author = {Polak, E. and Ribiere, G.},
     title = {Note sur la convergence de m\'ethodes de directions conjugu\'ees},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
     publisher = {Dunod},
     volume = {3},
     number = {R1},
     year = {1969},
     pages = {35-43},
     zbl = {0174.48001},
     mrnumber = {255025},
     language = {fr},
     url = {http://www.numdam.org/item/M2AN_1969__3_1_35_0}
}

Polak, E.; Ribiere, G. Note sur la convergence de méthodes de directions conjuguées. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 3 (1969) no. R1, pp. 35-43. http://www.numdam.org/item/M2AN_1969__3_1_35_0/

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