1. The multiphase flow of gas, oil and water through vertical flow strings with application to the design of gas-lift installations;Poettman;Drill Prod Practice,1952
2. Multiphase flow of water, oil and natural gas through vertical flow strings;Tek;J Pet Tech,1961
3. Prediction of pressure gradients for multiphase flow in tubing;Francher;Soc Pet Eng J,1963
4. Emulsions and Their Technical Treatment;Clayton,1935
5. The viscosity of crude emulsions;Woelfin;API Drilling and Production Practice,1942