Shonazarova, S. I. ., B. X. . Qudratov, and D. S. . Urumbayeva. “Determination of the Degree of Regeneration of Fluoride Ammonium”. Middle European Scientific Bulletin, vol. 23, Apr. 2022, pp. 143-6, https://cejsr.academicjournal.io/index.php/journal/article/view/1208.