- Author: Георги Бойчев
- Language: Bulgarian
- Year: 2007
- Author: Бойчев А.С. Хандрига А.Я.
- Language: Русский
- Author: Бойчев Б. Комфорт В. Чоканов К.
- Language: Русский
- Author: Бойчев Б. и др.
- Language: Русский
- Year: 1961
- Author: Бойчев Б. и др.
- Language: Русский
- Year: 1971
