1. Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (2004). International Tables for Crystallography, Volume C: Mathemathical, physical and chemical tables, third edition. Edited by E. Prince, pp. 778-789. Dordrecht/Boston/London: Kluwer.
2. Bis(1-ammonioethane-1,1-diyldiphosphonato-κ2O,O′)diaquacobalt(II) nonahydrate
3. Brandenburg, K. & Putz, H. (2010). DIAMOND. Crystal Impact GbR, Bonn, Germany.
4. Bruker (2007). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
5. Supramolecular chemistry and complexation abilities of diphosphonic acids