Hashim, A. N., Yaakob, O. B., Koh, K., Ismail, N., & Ahmed, Y. M. (2015). Review of micro-bubble ship resistance reduction methods and the mechanisms that affect the skin friction on drag reduction from 1999 to 2015. Penerbit UTM Press.

Hashim, Azlina N., O. B. Yaakob, Khoking Koh, Nasrudin Ismail, and Yasser Mohamed Ahmed. Review of Micro-bubble Ship Resistance Reduction Methods and the Mechanisms That Affect the Skin Friction On Drag Reduction From 1999 to 2015. Penerbit UTM Press, 2015.

Hashim, Azlina N., et al. Review of Micro-bubble Ship Resistance Reduction Methods and the Mechanisms That Affect the Skin Friction On Drag Reduction From 1999 to 2015. Penerbit UTM Press, 2015.