1. V. I. Bakhman, S. S. Krapivina, and K. P. Florenskii, Analysis of Mineral Waters (Ministry of Health Care of RSFSR, Moscow, 1960) [in Russian].
2. L. Bergmann, Der Ultraschall und seine Anwendung in Wissenschaft und Technik (S. Hirzel-Verlag, Stuttgart, 1954; Inostrannaya Literatura, Moscow, 1956).
3. Great Aral Sea in the Beginning of 21st Century: Physics, Biology, and Chemistry, Ed. by P. O. Zav’yalov, (Nauka, Moscow, 2012) [in Russian].
4. Drinking Water: Analysis Methods (Izd. Standartov, Moscow, 1984) [in Russian].
5. N. N. Efimov, Analysis of Dry Residue in Salt Rape (Institute of Physical-Chemical Analysis, Leningrad, 1926), Vol. 1, No. 2.