Grigor`yev, Viktor Petrovich
Nauka, 1965
Buku Teks
Shtevnfeldt, E.
Progress, [date of publication not identified]
Buku Referensi
Akademija nauk SSSR
Nauka, 1975
Buku Referensi
Vinogradov, Viktor Vladimirovich
Vysshaya Shkola, 1981
Buku Teks
Ivanova, Vera Fedorovna
Leningradskogo Universiteta, 1962
Buku Referensi