@article{M2AN_1985__19_4_671_0,
     author = {Potra, Florian A.},
     title = {On superadditive rates of convergence},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {671--685},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {19},
     number = {4},
     year = {1985},
     mrnumber = {826229},
     zbl = {0582.65043},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1985__19_4_671_0/}
}