2ISO 9300--2005 (E) Measurement of gas flow by means of critical flow Venturi nozzleS.
3K A Park, Y M Choi, H M Choi, et al. The evaluation of critical pressure ratios of sonic nozzles at low Reynolds numbers. Flow Meas- urement and Instrumentation,2001,12 : 37 - 41.
4Shin-ichi Nakao, Masaki Takamoto. Choking phenomena of sonic nozzles at low Reynolds numbers. Flow Measurement and Instrumen- tation ,2000,11:285 - 291.
5R W Caron, C L Britton, T Kegel. Investigation into the premature unehoking phenomena of critical flow venturis. Proceedings of ASME Fluids Engineering Division Summer Meeting, Boston, 2000.