Figgis, B. N.; Kucharski, E. S.; Reynolds, P. A.; Tasset, F. (15 June 1989). "The structure of (ND4)2Fe(SO4)2 · 6 D2O at 4.3 K by neutron diffraction". Acta Crystallographica Section C Crystal Structure Communications. 45 (6): 942–944. Bibcode:1989AcCrC..45..942F. doi:10.1107/S0108270188013903.
Figgis, B. N.; Kucharski, E. S.; Reynolds, P. A.; Tasset, F. (15 June 1989). "The structure of (ND4)2Fe(SO4)2 · 6 D2O at 4.3 K by neutron diffraction". Acta Crystallographica Section C Crystal Structure Communications. 45 (6): 942–944. Bibcode:1989AcCrC..45..942F. doi:10.1107/S0108270188013903.