Matorina, K., and O. Podpletnia. “Development of Potentiometric Sensors for Determining the Concentration of Ethan-1,2-Dicarboxylic and 2-Hydroxybenzoic Acids”. Eastern-European Journal of Enterprise Technologies, vol. 4, no. 10(82), Aug. 2016, pp. 16-23, doi:10.15587/1729-4061.2016.75385.