Kuznetsova, E. S., I. S. Pytskii, and A. K. Buryak. “Preparation of Ionic Clusters of Amino Acids in the Copper Sulfate Presence under the Field Ionization of Their Water-Acetonitrile Solutions Conditions”. Sorbtsionnye I Khromatograficheskie Protsessy, Vol. 18, no. 5, Oct. 2018, pp. 745-50, doi:10.17308/sorpchrom.2018.18/601.