
- Author: Даниела Колева Костадин Грозев (съст.)
- Language: Bulgarian
- Year: 2010

- Author: Честнов И.Л. (ред.)
- Language: Русский
- Year: 2018

- Author: Мережко А.
- Language: Русский
- Year: 2017

- Author: Мережко А.
- Language: Русский
- Year: 2017

- Author: Лехциер В.Л.
- Language: Русский
- Year: 2018

- Author: Левинсон Алексей
- Language: Русский
- Year: 2018

- Author: Михайловского Н.К.
- Language: Русский(Old)
- Year: 1896

- Author: Ковалевский М.М. де-Роберти Е.В.
- Language: Русский(Old)
- Year: 1914

- Author: Розанов В.В.
- Language: Русский(Old)
- Year: 1903