1. Duncombe, E. J. Phys. E . 17(1) (1984) 7–17.
2. Bentley, J.P. J. Phys. E . 17(6) (1984) 430–439.
3. Tullis, J.P. and Smith, J. Paper no. 6.3, Fluid Mechanics Jubilee Conf., National Engineering Laboratory, East Kilbride, Glasgow (1979).
4. Plache, K.O. Transducer Technol. 2(3) (1980) 19–23; (4) 5–6.
5. Cascetta F., Cignolo G., Goria R., Martini G., Rivetti A. and Vigo P. Trans Inst Meas and Control , 14 (2) (1992) 99–107.