“UNSATURATED REACTIONABLE DERIVATIVES OF BIURET”. Proceedings of the YSU B: Chemical and Biological Sciences 43, no. 2 (219) (May 22, 2009): 27–31. Accessed January 22, 2026. https://journals.ysu.am/index.php/proceedings-chem-biol/article/view/vol43_no2_2009_pp027-031.