H. Yar’Adua, Kabir., Abubakar J. Abbas, Idoko. J. John, Salihu M. Suleiman, and Aisha Kabir. 2021. “Investigating the Effect of Varying Tubing Air Concentration During the Descaling of Petroleum Production Tubing Using Multiple High-Pressure Nozzles”. American Scientific Research Journal for Engineering, Technology, and Sciences 76 (1):185-98. https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/6574.