(1)
Tkachuk, V. M.; Shoba, V. M.; Sukach, V. A.; Vovk, M. V. (S)-(+)-1-(2-pyrrolidinylmethyl)pyrrolidine – an Effective Catalyst of Asymmetric Synthesis. J. Org. Pharm. Chem. 2014, 12, 3-16.