2Barua S.. An Experimental Verification and Modification of Pigging Model for Horizontal Flow. M. S. Thess University of Tusa 1982.
3Minam, K. et al. Pigging Dynamics in Two-Phase Flow Pipeline: Experiment and modeling. SPE 26568, 1995.
4Gregory. G. A.. Nicholson M. K., and Aziz, K.. Correlation of the Liquid Volume Fraction in the Slug for Horizontal Gas-Liquid Slug Flow Int. J. Multiphase Flow, 1978, 4:33.