“Study Of The Solubility Diagram Of The System К+, NH4+ 1 2 SO4-2 – H2O At 25, 50, 75 And 100 0С”. Journal of Pharmaceutical Negative Results (November 3, 2022): 660–664. Accessed June 6, 2026. https://www.pnrjournal.com/index.php/home/article/view/2800.