[300]. V. Chandrasekhar, L. Nagarajan, R. Clérac, S. Ghosh, T. Senapati, S. Verma, “Barrel- and Crown-Shaped Dodecanuclear Copper(II) Cages Built from Phosphonate, Pyrazole, and Hydroxide Ligands”, Inorg. Chem., (2008), 47, 12, 5347-5354 / 10.1021/ic800509f