1. Handbook of Hydraulic Resistances;Idelchik,1994
2. Two-phase flow through gate valves and orifice plates;Simpson,1983
3. Two-Phase Flow in Pipelines and Heat Exchangers;Chisholm,1983
4. Two phase pressure drop across valves and orifice plates;Morris,1985
5. Two-phase pressure drop across pipe fitting;Friedel,1984