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 (Jan. 2019), 872. DOI:https://doi.org/10.15407/ujpe60.09.0872.