Citation: Vb. Ukraintsev et al., Transform of aziridine and N-(2-aminoethyl)aziridine in nickel(II) complexes during their interaction with formaldehyde(paraformaldehyde). Template synthesis of 26 <(1,4)-piperazino.2.N1.O.1.N.2(1,4)piperazino.2.N.1.O.1.N.2.coronand-10 > and other N-aminoethyl substituents of piperazine, ZH OBS KH, 69(1), 1999, pp. 134-137