R. G. Kostyanovsky, A. G. Korepin, P. V. Galkin, Yu. I. El'natanov, G. K. Kadorkina, I. I. Chervin, V. R. Kostyanovsky, “A Superstable Nitrogen Pyramid: Stereodirected N-Halogenation of Methyl 2-Aziridinecarboxylate”, Mendeleev Commun., 5:6 (1995), 216–217