Não informado. (1962). Abstracts of bulgarian scientific literature. Center for Scientific, Technical and Economic Information.
Lua i Stíl Chicago (17ú heag.)Não informado. Abstracts of Bulgarian Scientific Literature. Sofia: Center for Scientific, Technical and Economic Information, 1962.
Lua MLA (8ú heag.)Não informado. Abstracts of Bulgarian Scientific Literature. Center for Scientific, Technical and Economic Information, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.