1. Aamo, O., Eikrem, G., Siahaan, H., and Foss, B. (2004). Observer design for multiphase flow in vertical pipes with gas-lift - theory and experiments. Journal of Process Control.
2. Abardeh, M.E. (2013). Robust control solutions for stabilizing flow from the reservoir: S-Riser experiments. Master's thesis, Norwegian University of Science and Technology, Department of Chemical Engineering.
3. Adedigba, A.G. (2007). Two-phase flow of gasliquid mixtures in horizontal helical pipes. Ph.D. thesis, Cranfield University.
4. Almeida, A. and Goncalves, M. (1999). Device and method for eliminating severe slugging in multiphase-stream flow lines. patent: Us6041803a.
5. Asheim, H. (1988). Criteria for gas-lift stability. Journ ofPetr.Tech., 1452-1456.