| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Lettere. 1916-1937 | 978-88-7462-607-6 (88-7462-607-X) | Ludwig Wittgenstein | |
| Wittgenstein - Engelmann. Briefe, Begegnungen, Erinnerungen | 978-3-85218-503-3 (3-85218-503-3) | 2006 | Ludwig Wittgenstein · Ilse Somavilla |