Katayeva, M., R. Mangazbayeva, and R. Abdykalykova. “Investigation of Complex Formation Processes of Hydroxypropylmethylcellulose and Polymethacrylic Acid in Aqueous Solutions”. Chemical Bulletin of Kazakh National University, no. 1 (December 31, 2012): 266-269. Accessed January 16, 2021. https://bulletin.chemistry.kz/index.php/kaznu/article/view/393.