Il`inskiy, Yuriy, author
Molodaya Gvardiya, 1963
Buku Teks
Ileva, Despina Panaiotova, author
Nauka i Izkustvo, 1972
Buku Teks
Furmanov, Dimitriy Andreyevich, author
Narodnaya Asveta, 1975
Buku Teks
Moscow : Izdacelstva ( Universitas Moscow)
Majalah, Jurnal, Buletin
Artikel Jurnal