Redkin, R. G. “The Synthesis of Spiro-2-Oxindole-Derivative Imides of Pyrrolidine-3,4-Dicarboxylic Acid With Biogenous Sulfur Amino Acid Residues and Their Antihypoxic Activity”. Journal of Organic and Pharmaceutical Chemistry 15, no. 2(58) (May 23, 2017): 55–67. Accessed April 26, 2024. https://ophcj.nuph.edu.ua/article/view/ophcj.17.914.