Hu, Nai-Liang, et al. “Synthesis of a Novel Sandwich Copper Complex [(TACN)2Cu](ClO4)2&Middot;H2O”. Asian Journal of Chemistry, vol. 17, no. 2, Jan. 2016, pp. 1276-80, https://asianpubs.org/index.php/ajchem/article/view/14339.