Bahmani-Oskooee, M, R Nouira, and S Saafi. “US Export Earnings from and Import Payments to German Industries: Role of the Real Exchange Rate and Asymmetry”. Economic Issues 26, no. 1 (March 1, 2021): 57–73. Accessed July 27, 2026. https://economicissues.org.uk/index.php/EI_OJS/article/view/345.