1. The application of sonic nozzles to the automated accuracy testing of gas flow meters;Wright,1985
2. Ein Prüfstand für Groβgaszähler mit überkritischen Düsen als Normalgeräte (A test stand for large-scale gas meters with supercritical nozzles as standard instrument);Aschenbrenner;PTB-Bericht,1979
3. Calibration of the new test rig for large gas meters of the Physikalisch-Technische Bundesanstalt;Aschenbrenner,1989
4. Measurement of gas flow by means of critical flow Venturi nozzles;ISDO 9300: 1990(E),1990
5. A proposed calibration hierarchy for gas flow;Caw,1987