* [https://fountainpendesign.wordpress.com/fountain-pen-nib-design-function/fountain-pen-nib-manufacturing-slitting-tipping/fountain-pen-nib-manufacture-faber-america/] Un articolo sulla costruzione di penne centrato sulla filiale americana della ''[[A. W. Faber]]'' e la ''Eberhard Faber'' | * [https://fountainpendesign.wordpress.com/fountain-pen-nib-design-function/fountain-pen-nib-manufacturing-slitting-tipping/fountain-pen-nib-manufacture-faber-america/] Un articolo sulla costruzione di penne centrato sulla filiale americana della ''[[A. W. Faber]]'' e la ''Eberhard Faber'' |