| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Etnicznosc Lad Konflikt Sprawiedliwosc | 978-83-7177-464-5 (83-7177-464-8) | |
| Ludoviko Lazaro Zamenhof | 978-83-933857-2-0 (83-933857-2-5) | 2014 |
| Ludwik Zamenhof | 978-83-7688-089-1 (83-7688-089-6) | 2012 |
Nomos · OS Ostoja · Poznanskie