Robertson DS (2004). „A possible natural antibacterial compound in the human metabolism”. Med Hypotheses.63 (3): 554–5. DOI:10.1016/j.mehy.2004.04.007. PMID15288387.
govengr.com
„Ortho-Polyphosphate Corrosion Inhibitors”. Government Engineering:The Journal for Public Infrastructure (September–October, 2006): 48–49. Arhivirano iz originala na datum 2011-07-11. Pristupljeno December 23, 2010.
nih.gov
ncbi.nlm.nih.gov
Robertson DS (2004). „A possible natural antibacterial compound in the human metabolism”. Med Hypotheses.63 (3): 554–5. DOI:10.1016/j.mehy.2004.04.007. PMID15288387.
„Ortho-Polyphosphate Corrosion Inhibitors”. Government Engineering:The Journal for Public Infrastructure (September–October, 2006): 48–49. Arhivirano iz originala na datum 2011-07-11. Pristupljeno December 23, 2010.