Leonova, N. A., Yurchenko, O. I. and Batrak, A. S. (2014) “Spectrophotometric determination of concentrations of Co (II) and Ni (II) in complex with 1- (2-pirydylazo) -2-naphthol in aqueous micellar medium”, Kharkiv University Bulletin. Chemical Series, 0(24), pp. 153-160. doi: 10.26565/2220-637X-2014-24-19.