@article{GDZPPN002038536,
title = {A generalization of Ostrowski' theorem on ultrametric inequalities.},
journal = {Aequationes mathematicae},
volume = {41},
year = {1991},
pages = {2-12},
zbl = {0723.12008},
url = {http://dml.mathdoc.fr/item/GDZPPN002038536}
}
García-Roig, J.L. A generalization of Ostrowski' theorem on ultrametric inequalities.. Aequationes mathematicae, Tome 41 (1991) pp. 2-12. http://gdmltest.u-ga.fr/item/GDZPPN002038536/