Ndiolene, Adrienne, et al. “Tetrachloro-(acetylacetonato)stannate(IV) and Tri-iodocadmate(II) Stabilized by a Heptacyclic Cation: Synthesis, Characterization, and Crystal Structure”. European Journal of Chemistry, vol. 15, no. 4, Dec. 2024, pp. 338-44, doi:10.5155/eurjchem.15.4.338-344.2593.