Smirnov, Nicolay N., Daria N. Smirnova, Aleksandr P. Ilyin, and Sergey P. Kochetkov. “PROBLEMS AND PROSPECTS OF PRODUCTION AND QUALIFICATION OF PHOSPHORIC ACID”. ChemChemTech 60, no. 7 (August 24, 2017): 48-56. Accessed June 4, 2025. https://ctj-isuct.ru/article/view/153.