1. Measurement of fluid flow by means of orifice plates, flow nozzles and venturi tubes;ISO 5167,1980
2. The flow of water through orifices;Beitler,1935
3. Untersuchungen zum Problem der Kantenunscharfe bei Normblenden und bie Segment-blenden;Herning;Brenns-Warme-Kraft,1962
4. Die Kantenunscharfe von Normblenden und Segmentblenden und das Ahnlichkeitsgesetz;Herning;Brenns-Warme-Kraft,1963
5. Measurement and effects of edge sharpness on the flow coefficients of standard orifices;Crocket;Trans ASME, J. of Fluids Engng,1973