Meshtaninov, Ivan Ivanovich, author
Nauka, 1967
Buku Referensi
Maytinskaya, Clara E., author
Nauka, 1969
Buku Referensi
Preobrazhensky, A. G., author
Columbia University Press, 1951
Buku Referensi
Българска академия на науките институт за бъулгарски език; Д. Калинова; Ат. Д. Атанасов
B`lgarskata Akademiya na Naukite, 1971
Buku Teks
Lily Kristiantin, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1988
UI - Skripsi (Membership)