1. Fountain pens: History and design;D'Amia,1998
2. L.D. Vinci, The collection of scientific writings in the Codex Leicester. 1504-1508.
3. N. Bion, British Museum of Writing, the “La plume sans fin”. https://www.museumofwriting.org/items/show/8728. 1689.
4. P. Poenaru, B. d. I. No 3208 (Mai), 1791.
5. S.E. Andros, S. E. https://www.writeherekitenow.co.uk/onoto.html 1905.