Tuncel, M. (2014). Synthesis and Characterization of Novel Polymer-Metal Complexes of Cu(II), Ni(II) and Co(II) Derived from Poly(4,5-dihydroxy-2,7-naphthalene Disulfonic Acid). Asian Journal of Chemistry, 26(7), 2147–2152. https://doi.org/10.14233/ajchem.2014.16604