Erratum
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 5 (1971) no. R3, p. 60.
@article{M2AN_1971__5_3_60_1,
     title = {Erratum},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
     pages = {60--60},
     publisher = {Dunod},
     volume = {5},
     number = {R3},
     year = {1971},
     language = {fr},
     url = {archive.numdam.org/item/M2AN_1971__5_3_60_1/}
}
 (éd.). Erratum. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 5 (1971) no. R3, p. 60. http://archive.numdam.org/item/M2AN_1971__5_3_60_1/