Sabirov, L. M., Semenov, D. I. and Khaydarov, K. S. (2019) “Negative Dispersion of High-Frequency Sound Velocity in Aqueous Solutions of Non-Electrolyte in a Vicinity of the Singular Point Concentration”, Ukrainian Journal of Physics, 60(9), p. 872. doi: 10.15407/ujpe60.09.0872.