Vellem V, Matezo Espoir L. The impact of aid for trade on horizontal and vertical export diversification: The case of Sub-Saharan Africa and Developing Asia. IJRBS [Internet]. 2021 Aug. 8 [cited 2025 May 23];10(5):135-47. Available from: https://www.ssbfnet.com/ojs/index.php/ijrbs/article/view/1296