Papava, G., N. Gelashvili, E. Gavashelidze, K. Archvadze, and R. Liparteliani. “Synthesis of Biodegradable Polymers Based on Carbamide and Formaldehyde”. The Journal of Nature Studies - Annals of Agrarian Science, vol. 20, no. 1, Aug. 2022, https://journals.org.ge/index.php/aans/article/view/131.