MIECZNIK, Piotr. “The Investigation of the Stabilization of the Structure of Aqueous Solutions of Hexamethylphosphortriamide Using an Acoustic Method”. Archives of Acoustics, vol. 5, no. 4, Mar. 2016, pp. 247-62, https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3349.