Grabowska, B., and M. Holtzer. “Application of Spectroscopic Methods for Investigation of the Course of poly(sodium Acrylate) Crosslinking With Use of Different Crosslinking Agents”. Polimery, vol. 53, no. 7-8, Aug. 2022, pp. 531-6, https://polimery.ichp.vot.pl/index.php/p/article/view/1338.