Meshtaninov, Ivan Ivanovich, author
Nauka, 1967
Buku Referensi
Foster, Alan Din, author
Eksmo, 2005
Buku Teks
teknik editor, Г. Шевченко; korektor, В. Л. Данилова, М. Б. Шварц
Detgiz, 1958
Buku Referensi
Beloshapkova, Vera Arsen`yevna, author
Prosveshhenie, 1967
Buku Referensi
Ivanova, Kalina, author
Izdatelstvo na b'lgarskata akademija na naukite, 1974
Buku Referensi