G. A. R. Rassoul and A. A. A. Hadi, “Drag Reduction of Crude Oil Flow in Pipelines Using Sodium Dodecyl Benzene Sulfonate Surfactant”, IJCPE, vol. 8, no. 2, pp. 29–34, Jun. 2007, doi: 10.31699/IJCPE.2007.2.5.