[1]. Fortuna L., Graziani S., Rizzo A. and Xibilai M. G., “Soft Sensors for monitoring and control of industrial processes,” Springer, 2007. ##
[2]. Aamo O. M., Eikrem G. O., Sihaan H. B. and Foss B. A., “Observer design for multiphase flow in vertical pipes with gas-lift - theory and experiments,” Journal of Process Contro, Vol. 15, Issue 3, pp. 247-257 April 2005.##
[3]. Nikoofard A., Johanson T. A. and Kaasa G. O., “Evaluation of lyapunov-based adaptive observer using low-order lumped model for estimation of production index in under-balanced drilling,” Norwegian University of Science and Technology, 2015.##
[4]. Lorentzen R. J, Navdal A. and Lage A. C., “Tuning of parameters in a two-phase flow model using an ensemble Kalman filter,” International Journal of Multiphase Flow, pp. Vol. 1283-1309, 2003.##
[5]. Leskens M, de kruif B., Belfroid S. and Gryzlov A., “Downhole multiphase metering in wells by means of soft sensors,” in SPE inteligent Energy Conference and Exhibition, SPE 71384, Amesterdam, The Netherlands, 2008.##
[6]. Gryzlov A., Leskens M. and Mudde R. F., “Soft sensing for two-phase flow using an ensemble Kalman filter,” Delft University of Technology, 2008. ##
[7]. Texeira B., Castro W. S. and Texeira A. F., “Data driven soft sensor of downhole pressure for a gas lift oil well,” Control Engineer Practice, Vol. 22, pp. 34-43, 2014.##
[8]. Kurian A., “Manual of petroleum measurement standards,” Chapter 20, API, 2016. ##
[10]. Bendiksen K. H., Malnes D. and Nydal O. J., “On the modeling of slug flow,” Chem. Eng. Comm., Vol. 71, No. 102, pp. 141-142, 1996.##
[11]. Vicente R., Sarica C. and Erteikin T., “A two-phase model coupling reservoir and Horizontal Well Flow dynamics,” SPE Paper 69570, Peoc, Buenos Aires, Argentina, 2003. ##
[12]. Jovanovic B. and Mihailo B., “Modeling flow statistics using the linearized Navier-Stokes equations,” in 40th IEEE Conference on Decision and Control, Orlando, 2001. ##
[13]. Zuber N. and Greg B., “Average volumetric concentration in two-phase flow systems,” Journal of Heat Transfer, Vol. 11, pp. 453-468, 1965. ##
[14]. Ishii M., “One-dimensional drift-flux model and constitutive equations for relative motion between phases in various two-phase flow regimes,” ANL, 1977. ##
[15]. Harmathy T., “Velocity of large drops and bubbles in media of infinite or restricted extent,” AIChE, J. Vol. 6, pp. 281-288, 1960.
[16]. Kalman R. E., “A new approach to linear filtering & prediction problem,” Transaction of ASME Journal of Basic Eng., Vol. 82, pp. 35-45, 1960. ##
[17]. Welch G. and Greg B., “An Introduction to the kalman filter,” University of North Carolina at Chapel Hill Department of Computer Science Chapel Hill, NC 27599-3175, SIGGRAPH, 2001.##
[18]. Kordic V., “Kalman filter,” Vienna: Intech, 2010. ##
[19]. IOIC C., “Overall Process Flow Diagram,” 2014. ##
)
