- Author: Various
- Language: German-French-English
- Author: Д. Спасов П. Бульова
- Language: Bulgarian, English
- Year: 1997
- Author: Анна Павлова
- Language: Bulgarian, English
- Year: 2000
- Author: Robert C. Melzi
- Language: English, Italian
- Year: 1990
- Author: Kenneth Urwin
- Language: French, English
- Author: Langenscheidt
- Language: German, English
- Year: 1986
- Author: В. Н. Крупнов
- Language: Русский, English
- Year: 2013
- Author: Николай Николаевич Смирнов
- Language: Русский, English
- Year: 2103
- Author: Неизвестно
- Language: English, Русский
- Author: И. В. Волянская
- Language: Русский, English
- Year: 2014