Mihail Buchvarov. (1973). Eleven Centuries of Bulgarian Philosophical Thought. Bulgarian Academy of Sciences.
Lua i Stíl Chicago (17ú heag.)Mihail Buchvarov. Eleven Centuries of Bulgarian Philosophical Thought. Sofia: Bulgarian Academy of Sciences, 1973.
Lua MLA (9ú heag.)Mihail Buchvarov. Eleven Centuries of Bulgarian Philosophical Thought. Bulgarian Academy of Sciences, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.