1. C.A. Dunbar, A.P. Watkins and J.F. Miller, A Theoretical Investigation of the Spray Issued from a pMDI, Proc. ICLASS-97, Seoul, Korea, 1997.
2. P.J. Atkins, Aerodynamic Particle-Size Testing - Impinger Methods, Pharm. Tech., 16 (8), pp. 26-32, 1992.
3. S.M. Milosovich, Particle-Size Determination via Cascade Impaction, Pharm. Tech., 19 (9), pp. 82-86, 1992.
4. R. Dhand, S.K. Malik, M. Balakrishnan and S.R. Verma, High Speed Photograhic Analysis of Aerosols Produced by Metered Dose Inhalers, J. Pharm. Pharmacol., 40, pp. 429-430, 1988.
5. W.G. Gorman and F.A. Carroll, Aerosol Particle-Size Determination Using Laser Holography, Pharm. Tech., 17 (2), pp. 34-37, 1993.