1. M. Diritti, M. Arietti, H. Bellinga, M. Cannizzo, F.J. Delhez, F. Deneuve, D. Donat, W. Frankvoort, B. Harbrink, P.M.A. Van der kam, W. Kerkmann, R. Norman and P. Rombouts, Intercomparison exercise of high pressure test facilities within GERG, GERG TM 6, 1993.
2. J. Bosio, K. Ciok, H. Coßmann, J. Van Damme, H. Elskamp, B. Harbrink, H.J. Hotze, I.J. Landheer, T. Løland, M. Muzzi, A. Niazi, M. Pritchard, G. Sloet, M. Tedeschi, D. Vieth and F. Vulovic, Intercomparison exercise of high pressure test facilities within GERG, GERG TM 12, 2001.
3. W.J. Youden, Graphical diagnosis of interlaboratory test results, Industrial quality control, May 1959.
4. Flow Measurement Proficiency Testing for International Intercomparisons and Traceability;Mattingly,1997
5. M.P. van der Beek and I.J. Landheer, Developments in methodology to compare the performance of high-pressure gas-flow measurement facilities, in: Proceedings of FCRI, Pelakkad, India, 20 September 2000.