Shanshool, J. ., & Al-Qamaje, H. M. T. (2008). Effect of Molecular Weight on Turbulent Drag Reduction with Polyisobutylene.
Nahrain University College of Engineering Journal,
11(1), 52-59.
https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/496