“Study Sorption Amino- and Carboxylic Acid on the Surface of Polyamic Film With the Piezoelectric Sensor”. Sorbtsionnye I Khromatograficheskie Protsessy, vol. 15, no. 6, Feb. 2018, pp. 884-7, https://doi.org/10.17308/sorpchrom.2015.15/344.