Gulevich, Alyaksandr L., Evgenii M. Rakhman’ko, Vladimir V. Egorov, and Marina S. Smirnova. 2019. “Anion-Exchange Extraction of Mefenamic Acid”. Journal of the Belarusian State University. Chemistry, no. 2 (January): 10-17. https://journals.bsu.by/index.php/chemistry/article/view/1236.