Klaus Schrödter; Gerhard Bettermann; Thomas Staffel; Friedrich Wahl; Thomas Klein; Thomas Hofmann (2008). "Phosphoric acid and phosphates". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_465.pub3. ISBN978-3527306732. S2CID94458523.
Nord, A. G.; Stefanidis, T. (1983). "Structure of cobalt(II) phosphate structure refinements of Co3(PO4)2. A note on the reliability of powder diffraction studies". Acta Chemica Scandinavica A. 37: 715–p721. doi:10.3891/acta.chem.scand.37a-0715 (inactive 9 September 2025).{{cite journal}}: CS1 maint: DOI inactive as of September 2025 (link)
Klaus Schrödter; Gerhard Bettermann; Thomas Staffel; Friedrich Wahl; Thomas Klein; Thomas Hofmann (2008). "Phosphoric acid and phosphates". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_465.pub3. ISBN978-3527306732. S2CID94458523.