1. Inertial Flows;Churchill,1980
2. Chemical Process Safety: Fundamentals with Applications;Crowl,2002
3. Engineering Flow and Heat Exchange;Levenspeil,1984
4. C. Crane, Flow of Fluids through Valves Fittings and Pipe, Technical Paper No. 410, Crane Company, Joliet, IL, 1988.
5. Critical length helps calculate compressible flow;Farina;Chem. Eng. J.,1997