1. N. S. Kurnakov, Izv. Sekt. Fiz.-Khim. Anal. 1(1), 78 (1919).
2. N. S. Kurnakov, The Introduction to Physicochemical Analysis, 4th ed. (Akad. Nauk SSSR, Moscow, 1940) [in Russian].
3. N. S. Kurnakov, Collection of Selected Works (ORTI, Khimteoret, Leningrad/Moscow, 1938), Vol. II, p. 202 [in Russian].
4. N. S. Kurnakov, Selected Works (Akad. Nauk SSSR, Moscow, 1963), Vol. II, p. 361; Vol. III, p. 27 [in Russian].
5. V. Ya. Anosov and S. A. Pogodin, The Principles of Physicochemical Analysis (Akad. Nauk SSSR, Moscow, 1947), p. 503 [in Russian].