1. Ornemark U (2004) Accred Qual Assur 9:44–46
2. Reichmuth A (2000) Estimating weighing uncertainty from balance data sheet specifications. Mettler Toledo
3. Reichmuth A (2001) Weighinh accuracy. Estimating measurement bias and uncertainty of weighing. Mettler Toledo
4. ISO (1993) Guide to the Expression of Uncertainty in Measurements, ISO, Geneva, Switzerland, Corrected and reprinted in 1995
5. International Organisation of Legal Metrology (OIML) (1994) R111, Weights of classes E1, E2, F1, F2, M1, M2 and M3