Drozd, A. V., & Leonova, N. A. (2012). Spectrophotometric determination of soluble complexes with 1-(2-pyridylazo)-2-naphthol in water at different pH. Kharkiv University Bulletin. Chemical Series, (21), 218-223. https://doi.org/10.26565/2220-637X-2012-21-21