Yu. V. Torubaev, I. V. Skabitsky, G. A. Saratov, P. Yu. Barzilovich, “Halogen vs. ionic bonding: an unusual isomorphism between the neutral (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Fe/C<sub>2</sub>I<sub>2</sub> cocrystal and ionic [(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Fe]Br<sub>3</sub> crystal”, Mendeleev Commun., 31:1 (2021), 58–61