Redkin, R. G. (2017) “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(2(58), pp. 55–67. doi: 10.24959/ophcj.17.914.