1. Petroleum Production Technology of Lifting Methods;Brown,1990
2. J. Mach, E. Proano, K.E. Brown, A Nodal Approach for Applying Systems Analysis to the Flowing and Artificial Lift Oil or Gas Well. SPE 8025
3. Vertical Flow of Gas and Liquid Mixtures in Wells;Duns,1984
4. Predicting Two-phase Pressure Drop in Vertical Pipe;Orkiszewski;JPT,1967
5. A Study of Two Phase Flow in Inclined Pipes;Beggs;JPT,1973