Izd-vo na Bŭlgarskata akademii͡a︡ na naukite · Pensoft Pub
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Threatened Animals of Bulgaria: Natural Conservation Status and Distribution in Ecosystems | 978-954-430-661-8 (954-430-661-7) | 2000 |
| Threatened Animals of Bulgaria: Natural Conservation Status and Distribution in Ecosystems | 978-954-642-072-5 (954-642-072-7) | 2000 |