Leonova, N. A., Yurchenko, O. I., & 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, (24), 153-160. https://doi.org/10.26565/2220-637X-2014-24-19