“Impact of Using Double Layers Perforated Liners on the Acoustic Treatments of the Combustor Systems”. Al-Khwarizmi Engineering Journal 16, no. 4 (December 1, 2020): 19–26. Accessed April 30, 2025. https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/714.