@article{AM2_1997__53_1-2_137686,
     author = {Jacek R. Jachymski},
     title = {An extension of {A.} {Ostrowski's} {Theorem} on the round-off stability of iterations.},
     journal = {Aequationes mathematicae},
     pages = {242--253},
     publisher = {mathdoc},
     volume = {53},
     number = {1-2},
     year = {1997},
     zbl = {0885.47023},
     url = {http://geodesic.mathdoc.fr/item/AM2_1997__53_1-2_137686/}
}