1. Hauck WW, Koch W, Abernethy D, Williams RL, USP (2008) Making sense of trueness, precision, accuracy, and uncertainty. USP Pharm Forum 34(3):838
2. Byrialsen K, Soerensen EM, Riber UM, Redder T, Jespersen AM, Zeuthen N (2008) Novo Nordisk A/S, Krogshøjvej 51, KD-2880 Bagsværd, Denmark. Uncertainty statement regarding USP reference standards. USP Pharm Forum 34(2):477
3. Small Molecules Collaborative Group, Williams RL, Abernethy DR, Koch WF, Hauck WW, Cecil TL (2009) Performance-based monographs. USP Pharm Forum 35(3) May-June 2009
4. Pappa HN (2011) General chapter <1225> validation of compendial methods. USP34-NF29, p 778
5. International Conference On Harmonisation Of Technical Requirements For Registration Of Pharmaceuticals For Human Use (2005) Validation of analytical procedures: text and methodology Q2(R1). http://www.ich.org/fileadmin/Public_Web_Site/ICH_Products/Guidelines/Quality/Q2_R1/Step4/Q2_R1__Guideline.pdf