1. Ackello-Ogutu, C. & P. Echessah (1997). Unrecorded cross-border trade between Kenya and Uganda. Technical paper n. 59, USAID.
2. Afolayan, A. (2000). Trans-Border Studies: The Motivation and Integration of Immigrations in the Nigeria-Niger Border Area/Transborder Movement and Trading. A Case Study of a Borderland in Southwestern., Chapter Trans-Border Movement and Trading. A case study of a borderland in southwestern Nigeria., pp. 33–88. Institut français de recherche en Afrique.
3. Afrika, J. -G. K. & Ajumbo G. (2012). Informal cross border trade in Africa: Implications and policy recommendations. Africa economic brief, Africa Economic Brief.
4. Azonsi, F., A. Tossa, M. Kpomasse, F. Lanhoussi, A. Zannou, & A. Gohoungossou (2018). Atlas hydrographique du benin. Technical report, Ministere des Mines, de l’Energie et de l’Eau.
5. La corruption au port de Cotonou: douaniers et intermédiaires;Bako-Arifari;Politique Africaine,2001